CPU: nRF52840 Display: 1.3 TFT-LCD Colorful, full touch Technology: BT 5.0, G-SENSOR, Waterproof IP68  Battery: 210 mAh Li-polymer  Compatibility: iOS 9.0 or above and Android 5.0 or above Dimensions: 250mm x 37mm x 12mm Other Function: Built-in GPS, Call waiting, Notifications, Heart rate, Pedometer, Calories, Distance, Stopwatch, Sleep Monitor, Sports (Running, Walking, Hiking, Pool swimming, Cycling, Yoga etc.), Wrist Sense, Music remote control, Report menstrual.