Amazfit T-Rex Ultra Smart Watch 47mm for Men, 20-Day Battery Life, 30m Freediving, Dual-Band GPS, Mud-Resistant, 100m Water-Resistant, Military-Grade Outdoor Sports Watch, for Android iPhone, Sahara

$ 399.99

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Price: $399.99
(as of Apr 02, 2025 15:36:28 UTC – Details)

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Launched in 2015, Amazfit is a leading global smart wearable brand focused on health and fitness, and part of Zepp Health, a health technology company.

At Amazfit, we believe that limits are self-imposed. Whether you’re striving for peak fitness, excelling as a professional athlete, or simply embracing life’s journey, our AI-powered smart wearables and wellness services are with you every step of the way.

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Stainless Steel & Mud-resistant Design: Constructed with super-strong 316L stainless steel and a patented mud-resistant bridge and buttons, Amazfit T-Rex Ultra is built to withstand any kind of action. The smartwatch’s HD AMOLED display can reach a peak brightness of 1,000 nits for ultra-clear visibility in any environment. Adjustable lugs ensure maximum comfort for the entirety of your epic adventures, and you can enjoy ultimate control with a responsive touchscreen and four convenient buttons.
30m Freediving Support: As the ultimate multi-environment outdoor smartwatch, the Amazfit T-Rex Ultra supports indoor and outdoor freediving to a depth of up to 30 meters. It can also resist the equivalent of up to 100 meters’ water pressure, making it perfect for all your swimming, surfing and kitesurfing activities.
Dual-band GPS & Route Navigation: The smartwatch utilizes both L1 and L5 signals for incredibly precise dual-band GPS positioning, and supports six satellite systems for greater global coverage. Import a route file to the watch along with a corresponding Offline Map, and navigate with professional-level environmental understanding.
Mighty 20-day Battery Life: Experience energy beyond extinction, with battery life that can last a super-long 20 days. The sports watch also introduces a new Endurance GPS battery mode for those who love to lose themselves in nature for long periods of time, plus a new Automatic GPS battery mode which intelligently adjusts GPS settings based on signal strength, to help conserve power.
-30℃ Ultra-low Temperature Operation: Built for the brave, the watch is tough enough to be operated in extreme temperatures as low as -30℃, thanks to its specially designed circuitry system and battery. So not only can the watch body physically resist the cold, but you can keep using the watch’s functions as the conditions get more intense.
Military-grade Toughness: Resistant to extreme 70℃ heat and -40℃ cold – as well as humidity, shock and more – this outdoor smartwatch has proved its toughness by passing 15 military-grade tests. Understand your surroundings better with the built-in compass and barometer, along with environmental reminders and a host of other useful features.
Supported Devices: Compatible with Android 7.0 and above, iOS 12.0 and above devices.
Connection: WLAN 2.4GHz, Bluetooth 5.0 BLE.

Customers say

Customers find the smartwatch good-looking and well-built, with positive feedback about its functionality, with one customer noting it does almost everything a Garmin watch can do. The GPS tracking receives positive reviews, with one customer mentioning it tracks heart rate against route. The battery life and ease of use receive mixed reactions, with some praising the battery life while others report poor performance, and one customer finding the setup process time-consuming. The connectivity and ease of use aspects also receive negative feedback.

AI-generated from the text of customer reviews

8 reviews for Amazfit T-Rex Ultra Smart Watch 47mm for Men, 20-Day Battery Life, 30m Freediving, Dual-Band GPS, Mud-Resistant, 100m Water-Resistant, Military-Grade Outdoor Sports Watch, for Android iPhone, Sahara

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  1. Amazon Customer

    It’s a large watch with lots to offer
    The watch is doing well to meet my varied uses. The watch is doing well tracking and recording my hikes, rows and walks. Lots of choices for watch faces and still searching for the one that gives it a good look and I can read the numbers related to the functions. Thought the battery life would be more but is less from what is advertised; Probably 70% lifespan.

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  2. Corey M.

    The best training watch I ever used.
    This watch is phenomenal in getting you into shape. They’re is a huge program of information for the tech junkie. Also in tracking food, heart rate, and sleep…. I never knew a product could help me so much. The battery is so good you forget to bother with charging. The display and features keep you on track and as an ex trainer, I would recommend this for all clients. Great job Amazon. You knocked this out of the park. I immediately (7days) bought my wife one to help her.Corey

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  3. Timothy M Shepherd

    It’s the best..for me
    This watch is fantastic! This is my 4th smartwatch. I’ve had the Samsung, 2 different Fitbits, and the apple watch. I am an iphone user. Nothing can compare to the apple watch paired with the iphone, it’s seamless and the display is just beautiful. All that said I hate the way the apple watch looks. It looks like it was designed by girls for girls. Nothing against girls but I want a smartwatch that looks like a watch. I liked the look of the Samsung but just like the apple watch the battery life killed all the positives. This Amazfit T-Rex Ultra is beautiful, a man’s watch, and I get 5 days of battery life normally. I know that’s not the 20 days advertised but I like the always on display plus I wear it 24 hours a day everyday. The incredible things include nice display and many awesome watch faces. App is also pretty awesome. The workout and sleep feature details are also great, One huge thing is how fast it charges. I can pop it on the charger at 5% and it will be fully charged in 45 min and if needed you can charge it for like 10 min and get another day out of it. Bravo amazfit! Yeah you can’t respond to text or answer a call on it which i’ll admit are convenient features but you do see text and notifications and it lets you see the incoming call and reject it. To me the trade offs are worth it cause it’s beautiful and pretty great all around. If you like your apple watch or your a girl then keep your apple watch because this is not really better…or is it?

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  4. duckdangerous

    Chip glass
    I had the Trex pro 2 for about 2 years use it and abused it on the daily and the screen never broke had a few scratches as expected, so I thought these one would be as durable but to my surprise I only had it for 3 months and the screen is already chip and I had no idea what caused, I’m very disappointed with the glass resistant but happy everything else they really a improvement from TRex 2

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  5. John D. Werland

    Still working great
    I bought this watch about a year ago. It has many great options. The battery life was unreal at first. I noticed that if you play with the settings too much, you can over set your power consumption. (i.e. Always on displays, gps tracker, etc.)I have found my happy spot and charge my battery about once every third week. If I do a lot of workouts, that changes to two weeks. I do use the gps mapping while running, walking, and kayaking.I also bought a metal link band for it. The plastic type bands get stinky, although you can wash it easily with the water resistant watch. The metal band makes it heavier but that is what I personally like.One minor flaw was the issue of connecting my text messages to the phone. It is possible, just not very intuitive. I had to read, reread, and got a little frustrated. I also cannot use the watch interlinked with Amazon Music. An update could have come out that made those complaints invalid, but I haven’t checked lately. (Update: my watch is now connected to my Amazon Music!)I love the different faces you can select, but be careful of power requirements. The watch charges very fast, so if you don’t mind the minor inconvenience, you can choose whatever you fancy.Overall I am very impressed with this watch.

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  6. Alexander cano

    calidad precio indiscutibles
    no necesitas mas para el día a día!

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  7. Jeff

    Great quality sharp looking watch. Notifications delayed.
    The watch is great and looks awesome. My only issue is that the notifications are sporadic. Sometimes they occur on time, sometimes they take forever to push to the watch. Sometimes my phone goes off, I wait for it to hit my watch, nothing, then I go to see the message on my phone and when I unlock it pushes to my watch. It can be annoying and frustrating. I expected notifications to be instant like my Samsung watches, especially for the money. Buyers should also be aware that there is no microphone. Taking calls on this watch is not possible.

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  8. Jjh

    Great watch! Even better when you can get one for like new
    Love the watch for all of the technical attributes! Especially auto sensing exercise, long walks, etc. with gps kicking in too, you can track heart rate against route to see how you were doing against the terrain.While it does not integrate as easily as my apple watch, this watch is a bang for the bucks.

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    Amazfit T-Rex Ultra Smart Watch 47mm for Men, 20-Day Battery Life, 30m Freediving, Dual-Band GPS, Mud-Resistant, 100m Water-Resistant, Military-Grade Outdoor Sports Watch, for Android iPhone, Sahara
    Amazfit T-Rex Ultra Smart Watch 47mm for Men, 20-Day Battery Life, 30m Freediving, Dual-Band GPS, Mud-Resistant, 100m Water-Resistant, Military-Grade Outdoor Sports Watch, for Android iPhone, Sahara

    $ 399.99

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