Activity tracker, wireless multifunctional watch BT 4.0, 1.54" IPS touchscreen, battery 160 mAh 3.7V, working distance up to 10 m, compatible with iOS 9.0 (or higher) and Android 5.0 (or higher), USB rechargeable, functions: heart rate monitor, blood pressure monitor, blood oxygen monitor, calories counter, BT calls function, sleep monitor, torch, APP notify, messages notify, camera remote, alarm, vibration, time and date, anti-lost function, pedometer, music player, phone book, stopwatch