A military standard watch with 12 military certificates, the Amazfit T-rex smartwatch is ideal for times when the going gets tough. | Thanks to its rugged exteriors, this smartwatch can withstand tough enviroments like extreme cold (-140 F) to extreme hot weather (+150 F) to 240 hours in damp heat, etc. | Use it for upto 20 hours on a single charge! It has 28nm Sony GPS chip to make sure your power consumption remains low even with continuous GPS usage for 40 hours. | It comes with 1. 3” AMOLED screen with an always-on display, and 5 bold colors to choose from. | With 14 sport modes and 5 ATM water resistant body, the Amazfit T-Rex is perfect for outdoor enthusiasts.