Amazfit T-Rex Ultra 1.39″ AMOLED 326 PPI Peak 1,000nit Brightness 316L Stainless Steel and Mud-resistant Design 30m Freediving Support Up to 100 meters water pressure Dual-band GPS & Route Navigation (Offline Map) 162 Sports Modes Passing 15 military-grade tests Up to 20 Day Battery Life WLAN 2.4GHz, Bluetooth 5.0 BLE Android and iOS