Features: Skin-closed material, comfortable and safe to wear. 0.91inch OLED HD high sensitive touch screen display, 128*32pixel. BLE 4.2 ultra-low power BT chip and 3D acceleration sensor,excellent performance. IP65 life waterproof level. (swimming and taking shower not suggestion) 85mAh large lithium ion battery capacity, long standby time. Compatible with iOS 7.1 above or Android 4.3 above devices. Functions: BT Phone--Calling Reminder, SMS remind (Android Platform), Wechat Reminder Health--Dynamic Heart rate monitor, Pedometer, Distance, Calories, Sleep Monitor Entertainment--Sedentary reminder, Text message reminder, Vibrating alarm, Anti-lost, Remote photo taking, Watch