This Amazfit T-Rex 3 can really go the distance. In normal use, it lasts 27 days. In GPS mode - up to 180 hours. And it can handle any trail you head out on, no matter how off-road, because it's insanely durable. It's passed military-grade tests and resistant to shock, heat, cold, and humidity. So it wouldn't think twice about accompanying you from the Arctic to the Sahara. But it's smart as well as strong, so you can track heart rate, V02 max and all your must-have performance metrics. And it's got a dedicated Hyrox mode, tracking every station and run segment with precision.  Good to know - You can record over 170 activities, and keep tabs on your progress with distance, speed and much more- Feel free to leave your watch on when taking a dip in the sea - there's a 100 m swimproof rating- The T-Rex 3 monitors altitude changes and will prompt you to check your blood oxygen to help keep you safe when you're up in the clouds- The 1.5" AMOLED display is super bright and readable in sunlight for checking your stats on-the-fly- Dual-band GPS with free offline maps takes care of tracking and navigation even when you're exploring the back of beyond- Whether it's a 5K or a marathon, Zepp Coach builds a personalised plan that adapts to your progress - Powered by GPT-4, Zepp Flow gets things done with just your voice, keeping it hands-free