There is no practical benefit for Kyber developers to have chosen a PQC key-exchange algorithm. The Kyber ransom note gives victims one week to respond. Quantum computers capable of running Shor’s algorithm—the series of mathematical equations that allow the breakage of RSA and ECC (elliptic curve cryptography)—are, at a minimum, three years away and likely much further.

A Kyber variant that targets systems running VMware,  meanwhile, claims to use ML-KEM as well. Rapid7 said its look under the hood revealed that, in fact, it uses RSA with 4096-bit keys, a strength that will take even longer for Shor’s algorithm to break. Anna Širokova, a Rapid7 senior security researcher and the author of Tuesday’s post, said the use or claimed use of ML-KEM is likely just a branding gimmick and that implementing it required relatively little work by Kyber developers.

In an email, Širokova wrote:

First, it’s marketing to the victim. “Post-quantum encryption” sounds a lot scarier than “we used AES,” especially to non-technical decision-makers who might be evaluating whether to pay. It’s a psychological trick. They’re not worried about someone breaking the encryption a decade from now. They want payment within 72 hours.

Second, implementation cost is low. Kyber1024 libraries (renamed to ML-KEM) are available and well-documented. Ransomware doesn’t encrypt your files directly with Kyber1024. That would be slow. Instead, it:

Advertisement

1. Generates a random AES key
2. Encrypts your files with that AES key (fast)
3. Encrypts that AES key with Kyber1024 (so only the attacker can decrypt it)

In Rust, there are already libraries that do Kyber1024. The developer just adds it to their dependencies and calls a function to wrap the key.

Despite the hype, Kyber suggests that PQC is attracting the attention of less technically inclined attorneys and executives deciding how to respond to ransom demands. Kyber developers are hoping the impression that the encryption has overwhelming strength will sway people to pay.

Some Rednote users have reported that their accounts were automatically converted from the Chinese to the international version of the website recently. One American user, who asked to remain anonymous to avoid being punished by the platform, shared a screenshot with WIRED showing that when he logged into the platform in April, a banner appeared that read “Your account is a rednote account. We have automatically redirected you to rednote.com.”

The user says he registered his account with a Chinese phone number years ago, but suspects his account was converted because of using a non-Chinese IP address. “I have never posted from China. It’s always been in the United States. Obviously, in one glance, they can see this is an American posting in English,” he says.

Looming Split

After TikTok sidestepped a US shutdown by selling a majority stake in its American business, most of the “refugees” who had fled to Rednote went back to the video app or to other platforms. Those who stayed often did so because they value reading about and talking directly with Chinese people living in China. They now worry that a corporate split could destroy what had been one of the strongest bridges between the Chinese internet and the wider world.

Jerry Liu, a Vancouver-based TikTok influencer known for sharing funny content about Rednote itself, said in a November video that he was told by staff at the company’s Shanghai office that international users should expect to see less Chinese content and more North American content in the future. “I feel frustrated. I think it’s just gonna be less fun,” he said in the video.

Rednote had tried the TikTok localization playbook before—it launched a slew of regionally focused apps roughly three years ago with names like Uniik, Spark, Catalog, Takib, habU, and S’More that each catered to specific countries outside China, but they failed to catch on. The effort could have been a lesson for the company about the value of its massive Chinese content ecosystem to people in other countries, but as is often the case, regulatory and political considerations appear to have taken priority.

“I don’t want to see Americans talking about Coachella. I did that on Instagram, I didn’t join Xiaohongshu to see Instagram,” says the American user who was recently redirected to Rednote.

Security Concerns

As Rednote goes global, the company is no doubt looking to Chinese predecessors like WeChat and TikTok for ideas about how to navigate the minefield of content moderation and data privacy. So far, its approach looks to more closely resemble that of WeChat.

For over a decade, WeChat has sorted users based largely on one criterion: whether they used a Chinese or a foreign number to sign up. That has allowed users to cross Tencent’s digital border by unlinking and relinking their WeChat accounts to different mobile numbers.

Jeffrey Knockel, an assistant professor of computer science at Bowdoin College, found that Tencent censors content on WeChat and Weixin differently, even though the two platforms are integrated with one another and users can communicate across them. He says Chinese users are subject to a real-time keyword-matching filter to censor politically sensitive speech, but “if you registered for WeChat using a Canadian or an American phone number, your messages aren’t necessarily under that kind of censorship.”

Knockel says WeChat’s blended content moderation approach may have made some people wary about using the app. “Users are generally distrustful of the platform. They don’t know if they’re being watched and censored,” he says. As Rednote moves in a similar direction, it will be worth watching whether international audiences end up having similar misgivings.

This is an edition of Zeyi Yang and Louise Matsakis’ Made in China newsletter. Read previous newsletters here.

Anthropic is expanding its directory of connected services for its Claude AI chatbot. The platform can now link up with your accounts on AllTrails, Audible, Booking.com, Instacart, Intuit Credit Karma, Intuit TurboTax, Resy, Spotify, StubHub, Taskrabbit, Thumbtack, TripAdvisor, Uber, Uber Eats and Viator. Additional services will be added in the future.

More and more AI companies are trying to up their third-party integrations in a pitch to make their services as useful as possible. The benefit of having multiple apps connected means that a chatbot can theoretically execute more complicated tasks on your behalf. This expansion takes that capability from the professional and educational settings, where Anthropic’s connectors have been focused for the past year, to a personal one. So, for instance, Claude can now help plan a hike on AllTrails and then pull up a Spotify playlist that will last for the duration of your trek.

Anthropic noted that it is also reframing how apps are showing up so that an appropriate service is suggested for the task you want to perform. The apps should appear dynamically within the Claude conversation rather than needing a user to swipe between programs. As with most AI actions, Claude is supposed to check with its user before actually taking any actions like securing a reservation or making a purchase.

Engagement is a big deal in the world of social media. On Wednesday, Meta announced Live Chats, a new feature for the Instagram-supported social app Threads. It adds a real-time conversation component, letting people connect during high-interest cultural events, such as playoff or championship games, or even the drop of a highly anticipated album.

Live Chats won’t be limited to sports, but the feature is launching during the NBA Playoffs within the NBAThreads Community, and an assortment of personalities — Malika Andrews, Rachel Nichols, Trysta Krick, David Rushing and Lexis Mickens — will host Live Chats as the games unfold. 

The group chat experience includes countdowns, polls, live scores and other real-time options designed to keep the conversation active.

How to find Live Chats on Threads

Live Chats about the games will appear at the top of the NBAThreads Community, and they can also appear in your main feed on Threads if you follow a personality who has posted the link. A red circle will appear on a Live Chat host’s profile photo when they are live. More Community feeds will have the Live Chats feature in the coming months.

After you’ve entered the chat, you’ll be able to send and receive messages, attach photos, videos and links, and send reaction emoji. Anyone can join a chat, but it can reach capacity and stop accepting new users.

“Up to 150 participants can join in the Live Chat conversation (unless the host decides to make it invite only), but anyone can watch,” a Meta spokesperson told CNET. Once a Live Chat ends, it’ll no longer be pinned in the community feed, but will remain visible through previously shared posts.

How to start a Live Chat on Threads

Live Chats are open and public, but Meta allows only a select number of creators and personalities to host them on Threads. This includes Community Champions, who are active, influential users within a Threads community who stay engaged with others and keep conversations alive. 

To schedule a Live Chat, a qualified host will tap the three-dot menu in the top-right corner and select “Schedule a Live Chat.” You can give the chat a name, select a time frame for it to be live and then invite other Threads users to join or post the link to your feed and Instagram Story to get the word out.

A bigger Live Chats experience is coming

Once Meta refines the feature, more Live Chat attributes will be rolling out in the near future, including co-hosting, play-by-play commentary content, lock screen widgets and a share option that’ll let you quote chat messages directly in your Threads feed. 

Oppo has announced its flagship camera smartphone, the Find X9 Ultra, but how does it compare to Apple’s iPhone 17 Pro Max?

Although we haven’t specifically reviewed the Max model, we have reviewed the iPhone 17 Pro so we’ll draw on our experiences there whenever applicable. 

Read on to see what’s the difference between the Oppo Find X9 Ultra and the iPhone 17 Pro Max, and to decide which handset will suit you best.

Once you’re finished here, make sure you visit our Oppo Find X9 Ultra vs Find X9 Pro to see how Oppo’s flagships compare. Finally, our list of the best Android phones, best camera phones and best smartphones will undoubtedly have your next purchase solved.

Price and Availability

The Oppo Find X9 Ultra is the first of Oppo’s Ultra models to see a global launch. However, at the time of writing, we don’t have the exact pricing or release date for the UK. 

Advertisement

In comparison, the iPhone 17 Pro Max is readily available to buy now and has a starting price of £1199/$1199. Considering the Oppo Find X9 Pro has a similar starting price of £1099, we expect this means the more premium Ultra will be more expensive than the iPhone 17 Pro Max – however that’s speculation at this point.

SQUIRREL_PLAYLIST_10207953

Advertisement

Snapdragon 8 Elite Gen 5 vs A19 Pro

One of the biggest differences between the Find X9 Ultra and iPhone 17 Pro Max is with their respective chips. While the Find X9 Ultra runs on Qualcomm’s flagship Snapdragon 8 Elite Gen 5, the iPhone 17 Pro Max is powered by Apple’s own A19 Pro chip. 

The iPhone 17 Pro also runs on Apple’s A19 Pro chip, and we found the handset offers brilliant performance across both day-to-day use and in our benchmark tests too. We also concluded the iPhone 17 Pro copes well with games too, although if that’s a necessity for your handset then you’ll be better off checking our best gaming phones guide instead. 

Unsurprisingly, we found that the Oppo Find X9 Pro also offers a brilliant performance too. In fact, we especially found that the handset does a great job with ray-traced gaming too – something worth keeping in mind if you’d prefer not to opt for a gaming-specific handset. Not only that, but Snapdragon 8 Elite Gen 5 ensures everything runs smoothly and quickly too.

Advertisement

Oppo Find X9 Ultra has five rear cameras

Arguably the reason to choose the Oppo Find X9 Ultra is due to its mighty camera set-up. Created in collaboration with Hasselblad, the aptly titled Hasselblad Master Camera System is made up of five rear lenses, including dual Hasselblad 200MP main and 3x telephoto lens. In fact, the latter boasts the largest sensor of its kind and can be fitted with the 300mm Explorer Teleconverter that delivers a 300m focal length and 13x optical zoom too.

Advertisement

There are also two 50MP cameras which are flanked by a True Color Camera for natural colour rendition too.

In addition, the Find X9 Ultra is fitted with Oppo’s “most advanced cinematic capabilities to date”, and can not only deliver 4K60fps Dolby Vision HDR recording, but also captures 4K120fps via the Dual Hasselblad 200MP cameras too.

Oppo Find X9 Ultra

iPhone 17 Pro

Advertisement

Overall, we were blown away by the Find X9 Ultra’s photography capabilities, and concluded that its vibrant capture and multiple lenses “easily challenges Apple” for the best camera phone crown.

That’s not to say the iPhone 17 Pro Max is a slouch by any means, with its trio of rear lenses able to cope well with most lighting conditions and provide a brilliant detailed finish. While we haven’t reviewed the Pro Max, the iPhone 17 Pro has the same lenses on board and boasts the best zoom lens we’ve seen on an Apple flagship. 

Advertisement

Advertisement

Oppo Find X9 Ultra supports faster charging 

Like many of the best Android phones, the Find X9 Ultra supports exceptionally fast charging speeds – but only when paired with a compatible charger. So, while the iPhone 17 Pro Max supports 40W wired speeds and 25W MagSafe, the Find X9 Ultra boasts significantly faster numbers.

In fact, the Find X9 Ultra supports a whopping 100W SuperVOOC wired and 50W AirVOOC speeds. However, just keep in mind that you will need to purchase adapters separately to benefit from those speeds.

Oppo Find X9 Ultra has an IP66, IP68 and IP69 ratings

Durability is important when it comes to buying a phone and, fortunately, the Find X9 Ultra isn’t taking any chances. Not only does it sport the same IP68 rating as the iPhone 17 Pro Max, which means its dust-tight and can survive water submersion, but it also benefits from an IP66 and IP69 rating too. That means the handset can withstand high pressure and high temperature water jets too.

However, do keep in mind that the iPhone 17 Pro Max’s IP68 rating realistically offers more than enough protection for everyday use. Just think about how often your phone will really be subjected to water jets.

Advertisement

Advertisement

Oppo Find X9 Ultra has a 144Hz display

The 6.9-inch iPhone 17 Pro Max is fitted with Apple’s ProMotion technology, which means the panel has a LTPO-enabled 1-120Hz refresh rate that helps make animations, scrolling and gaming feel smooth. In comparison, the slightly smaller 6.82-inch Find X9 Ultra boasts up to a 144Hz refresh rate. 

Oppo Find X9 Ultra

iPhone 17 Pro

Advertisement

Otherwise, the Find X9 Ultra is equipped with an AMOLED, QHD+ display that we found to be “impossible to fault”. Similarly, the iPhone 17 Pro Max is equipped with a Super Retina XDR (OLED), HDR display.

Early Verdict

Deciding between the Oppo Find X9 Ultra and iPhone 17 Pro Max will mainly boil down to two factors: whether you’re cemented in either the Android or iOS ecosystem and whether you want an especially versatile camera phone. While the iPhone 17 Pro Max is undoubtedly a versatile camera phone, the five rear lenses of the Find X9 Ultra and the optional teleconverter undoubtedly offer more flexibility.

Some people learning the noble art of electronics find the jump from simpler tools like Fritzing to more complex ones, such as KiCAD, a little daunting, especially since they need to learn at least two tools. Fritzing is great for visualising your breadboard layout, but what if you want to start from a proper schematic, make a prototype on a breadboard and then design a custom PCB? Well, with the Kicad-breadboard plugin for (you guessed it!) KiCAD, you can now do all of this in the same tool.

Originally designed to support EE students at the University of Antwerp, the tool presents you with a virtual breadboard with configurable size and style, along with a list of components and tools that can be placed. A few clicks and parts can be placed on the virtual breadboard with ease. Adding wires is the next logical step to make those connections that operate in the horizontal dimension. Finally, assigning power supplies and probe connections completes the process. It’s a simple enough tool to draw stuff, but drawing a layout is no use if you can’t verify it’s correctness. This is where this plugin shines: it can perform an ERC (check) between the schematic and the breadboard and flag up what you missed. Add to this that you can also perform an ERC at the schematic level, before even thinking about layout, and it’s pretty hard to make an error. Now, you can transfer this directly to a real breadboard, or even a veroboard, for more permanence once you have confidence in correctness. This will definitely save time correcting errors and help keep the magic smoke safely contained within those mysterious black rectangles.

As it stands, the tools are limited to a few select ICs, which, much to this scribe’s disappointment, did not include the venerable 555 timer; however, it would be possible to work around that with some imagination at the schematic level. The ability to drop in and document power supply, function generator, and oscilloscope probing points is nice, enabling one to close the loop on documenting a layout to make it truly transferable to physical reality.

We cover electronics prototyping with breadboards a lot because they’re accessible. Here’s a super simple computer on a breadboard. We also like seeing them integrated as tools, like here. Finally, why stick with the tired old common breadboard shapes when you could make your own?

Audeze doesn’t need to reinvent itself every year to stay relevant, but it rarely stands still. At AXPONA 2026 in Chicago, the California headphone maker drew steady traffic in the Ear Gear section with a lineup that spans both audiophile and gaming use, anchored by its expanding use of SLAM technology across multiple models.

The booth stayed busy for a reason. Audeze is not chasing trends. It is refining its own approach, and listeners showed up to hear how that translates across a broader range of headphones rather than a single headline product.   

At the top of the range, Audeze CRBN2 and Audeze LCD-5s were both on hand and available for extended listening. We’ve already given both models Editors’ Choice Awards, and neither required much debate to get there. They take different paths to a similar destination.

The CRBN2 leans into a more forward presentation with added energy through the upper mids and lower treble, which gives it a sense of immediacy and openness that works well with detail-heavy material. The LCD-5s pulls things back slightly through the midrange, sounding more relaxed and a bit more natural over longer sessions without losing resolution.

Both now incorporate Audeze’s SLAM technology, which increases airflow and adds low-end weight without stepping on the rest of the frequency range. That matters. Electrostatic and planar designs have long carried a reputation for being light in the bass, and this feels like a direct response to that criticism. The added presence down low brings better balance without turning either headphone into something it isn’t.

I asked Karlee Little about a possible trade-up program for existing LCD-5 owners. The answer was polite but clear. Demand for current production is already high, and keeping up with orders is the priority. If anything like that happens, it won’t be anytime soon.

Custom Maxwell 2 Builds?

The Audeze Maxwell 2 was being demonstrated with both gaming systems and standard audio setups, and it rarely sat idle. The mix of listeners and gamers cycling through made it clear that Audeze understands where the volume is in today’s market.

I’ve had a pair on my desk for a few weeks, and the updates are not subtle. It builds on what was already one of the more compelling options at its price point with refinements that make it easier to recommend beyond just gaming use.

Audeze was also using the show to gather feedback on its new interchangeable faceplate concept, the reSkin program. Four gaming-inspired designs were on display, with more potentially on the way depending on response. Attendees were actively voting on which designs should come first, which is a smart way to avoid guessing wrong.

For context, Editor in-Chief Ian White and Editor at-Large Chris Boylan were shown early sample cup covers at CanJam NYC 2026, but Audeze asked us to hold off on sharing details until the program was finalized. What we saw in Chicago looks more like a controlled rollout than an experiment.

A full custom upload option where users submit their own graphics would make this far more interesting. Whether Audeze wants to deal with that level of complexity is another question. For now, the four designs on display are the starting point.

LCD-S20 Brings SLAM to the Studio

The fourth model incorporating SLAM is the Audeze LCD-S20, a closed-back design that Audeze had pulling double duty at AXPONA 2026. We were loaned four pairs for use at the podcast booth, and they were also available for demo on the show floor.

In a space that was anything but quiet, the LCD-S20 proved its value quickly. Isolation was the standout. Even with a steady wall of background noise, voices came through cleanly without needing to crank levels or fight the environment. Our producer kept pushing us to get closer to the mic to cut through the noise, but the headphones were already doing most of that work.

This model slots into Audeze’s studio lineup alongside the Manny Marroquin series and LCD-X variants, offering a closed-back alternative at roughly the same price point as the open-back MM-100. That alone makes it worth paying attention to. There aren’t many options in this range that aim for a reference tuning while also addressing real-world recording conditions.

Build quality is another strong point. The LCD-S20 feels durable without becoming a burden during long sessions. There was even some joking about dropping a pair off a third-floor balcony, which the rep didn’t exactly discourage. We didn’t test that theory, but the reaction said enough. Audeze seems confident these will hold up under normal use, and then some.

The Bottom Line

Audeze doesn’t operate on a fixed script, and that’s part of the appeal. One minute it’s solving niche problems like medical applications, the next it’s refining products aimed at gamers and studio users.

Based on what was shown and discussed at AXPONA 2026, SLAM looks less like a feature and more like a direction. It’s already spreading across multiple models, and there are few obvious scenarios where added airflow and improved low-end balance would be a drawback.

Beyond that, the roadmap is exactly what you’d expect from Audeze. It depends on what users ask for and what the engineering team decides is worth chasing. So far, that combination has produced a wide range of headphones that don’t all sound the same and don’t all chase the same audience. That’s not an accident.

Sony knew exactly what it was buying when it acquired Audeze, and from what we’ve seen up close, there’s no sign they intend to interfere with that momentum. As long as models like the Maxwell 2 and its collaborative offshoots keep moving in serious volume, Audeze has the room to keep pushing headphone design forward. That’s where things get interesting.

Where to buy:

Related Reading:

The Department of Justice announced Thursday that it arrested Gannon Ken Van Dyke, an enlisted member of the US Army’s special forces, for allegedly using “classified, nonpublic” information about the capture of Venezuelan president Nicolás Maduro to notch more than $400,000 in profits on Polymarket trades. A grand jury indicted him on five counts, including multiple violations of the Commodity Exchange Act.

Van Dyke is the first person to be charged with insider trading on a prediction market in the United States. Lawmakers have been voicing concerns for months about the high likelihood that politicians and public servants could use nonpublic information to profit from trades on leading industry platforms like Polymarket and Kalshi, which have exploded in popularity over the past year.

The arrest comes just weeks after Department of Justice prosecutors met with Polymarket about potential insider tradition violations. In February, Israeli authorities arrested two citizens, an Army reservist and a civilian, for allegedly leaking classified information by making wagers on Polymarket related to military operations. Kalshi, Polymarket’s primary rival in the United States, recently fined three politicians for breaking its insider trading rules, but it did not flag the violations for further enforcement to the Commodity Futures Trading Commission (CFTC), the federal agency that oversees prediction markets.

After Van Dyke’s arrest was made public, Polymarket posted a statement to social media noting that it had “identified a user trading on classified government information” and “referred the matter to the DOJ & cooperated with their investigation.” The company declined to comment further.

According to court documents, Van Dyke has been an active duty US soldier since September 2008 and rose to the level of master sergeant in 2023. At the time of the alleged trading activity, he was stationed at Fort Bragg in Fayetteville, North Carolina and assigned to the Army’s Special Operations Command Western Hemisphere Operations.

“I have been crystal clear that anyone who engages in fraud, manipulation, or insider trading in any of our markets will face the full force of the law,” CFTC Chairman Michael Selig said in a statement. “The defendant was entrusted with confidential information about US operations and yet took action that endangered US national security and put the lives of American service members in harm’s way.”

The complaint alleges that Van Dyke was involved in the planning and execution of Maduro’s arrest and that he was aware that he wasn’t authorized to share nonpublic information about US military operations. The complaint says that Van Dyke signed a nondisclosure agreement that forbade him from revealing sensitive or classified government information “by writing, word, conduct, or otherwise.” The complaint also alleges Van Dyke saved a screenshot to his Google account “displaying the results of an artificial intelligence query” outlining how the US Special Forces maintains many classified files including “operational details that are not available to the public.”

On December 26, Van Dyke allegedly opened an account on Polymarket and took out around $35,000 from his bank account before transferring it to a cryptocurrency exchange.

The following day, Van Dyke allegedly made his first Venezuela-related trade on Polymarket, putting a little less than $100 on a “YES” contract that US forces would be in Venezuela by January 31, 2026. Prosecutors accuse him of ultimately making 13 Venezuela-related transactions on the platform in total, seven of those—totalling hundreds of thousands of shares—on a “YES” contract for “Maduro out by … January 31, 2026.” In other words, Van Dyke allegedly stood to make an enormous profit if the Venezuelan leader wound up out of power by the end of the month.

Google adds a few innovative features to the Pixel Watch 4 LTE, priced at $390 (was $450), that will significantly improve your everyday routine. When you put that aluminum case on your wrist, you’ll be impressed at how comfortable it feels, because the weight just balances out. Fast charging is also a lifesaver; half a charge in 15 minutes keeps your routines running smoothly even if you’re constantly on the go.

The display has actually grown larger, while the bezels around it have shrunk, allowing you to see even more details at a glance. The watch face curls up slightly under the glass, and it looks sharp regardless of where the light is coming from. It’s also rather bright, reaching up to 3,000 nits. Plus, the colors appear natural, and the text does not get blurry even when viewed in low light conditions.

Sale

Google Pixel Watch 4 (41mm) – Android – 2 Years of Data – Heart Rate,Sleep & Fitness Tracking -30-Hour…

• Get 2yrs of data and texting included when you buy Pixel Watch 4 LTE[23]; Google Fi powers your messaging, navigation, and music on the go; offer only…
• See it all and do the most with the Actua 360 domed display; it’s 10% larger and 50% brighter than Pixel Watch 3, and as durable as ever with…
• The Google Pixel Watch 4 has Gemini built in[4]; just ask questions and your ultra capable AI assistant will deliver quick responses for personalized…

As far as battery life, you should be able to go all day and into the evening without having to stop and charge. The GPS is also much more accurate now, thanks to dual-frequency support, which allows it to carefully track your course even when you’re near buildings or trees. That means lap counts in the pool are much more accurate today, and you can finally stop guessing how fast you’re going. There is also a wide selection of activity kinds to measure, including various activities and even your heart rate. Sleep tracking is also quite handy, with clear summaries and recovery advice provided each morning to help you plan your day.

The watch’s UI is very quick to respond to taps and swipes, and with Gemini, you can ask it for information like the weather or directions directly from your wrist. It’s also much easier to receive alerts when they arrive, because the vibrations are strong enough to draw your attention and you don’t have to constantly examine the watch. Calls are much clearer, and on any Android phone, particularly a Pixel, you will receive notifications in real time.

This variant also supports LTE, so you can get online even if you don’t have your phone with you. This includes two years of free data and messaging with Google Fi. You can receive messages, maps, and even music directly to your wrist, eliminating the need to grab for your phone, and with all of the sensors on board, it can measure your heart rate and blood oxygen levels quite reliably. Satellite contact comes in handy during an emergency, allowing you to broadcast your location to someone.