Premium F8 Full Touch Screen Smart Watch . Compatible System of Phone and BLE Version: Screen: 1.3 inch screen with 240*240px resolution . Battery: 170 mAh . Withstands hand-washing or splashes water for daily use, but not available for bathing, sauna and diving. Product Type: Smart Bracelet Compatible System of Phone and BLE Version: AndroId 4.2 or above, IOS 9.0 or above, more Functions Time display, Step, Calories, distance, Sport mode, Raise your hand to brighten, Sleep monitoring, Running track, Incoming call, Message notification, Sedentary reminder, Alarm reminder, Shake a picture, Find the bracelet, Dial switch, Dial in English and Chinese, Integral measurement, WeChat movement, Heart rate, Blood pressure, Blood oxygen, Apple health, Health weekly, OTA upgrade.