Bluetooth 4.0 connectivity, stable signals and low power consumption Large color screen of 1.75 inches, with IP67 water resistance level, sweat-proof and durable for use Health monitoring: heart rate measurement, blood pressure measurement and sleep monitoring Never missing massage and phone calling, it can save massage records, like WeChat, QQ, Wahtsapp, etc With built-in 200mAh battery, long standby time up to 3-15 days Widely compatible with Android 4.4 or above and iOS 10.0 or above smartphones Great for sport, old people, boy, girl, suitable for most people who need to monitor health condition Specification: Screen size: 1.75 inches Resolution: 320 * 385 Waterproof: IP67 Battery capacity: 200mAh Standby time: 3-15 days Charging time: 3 hours Size: 43 * 37 * 11mm System requirements: Support Android 4.4 and above, Apple IOS 10.0 or above Main function: Call function, Bluetooth dialing, frequent contact list, call history, caller ID, answer/reject Motion Pedometer (exercise time, mileage, calories), exercise mode (walking, running, cycling, mountain climbing, football, basketball, table tennis) Health monitoring Heart rate / blood pressure / blood oxygen / body temperature/measurement, sleep monitoring Smart reminder Sedentary reminder, call reminder, message push (SMS / QQ / WeChat / Skype / Facebook / Twitter / Line / WhatsApp) Other Turn your wrist to bright the screen,Low battery modesilent mode, anti-lost, shake to take pictures, music control, stopwatch, alarm clock, calendar, calculator Bracelet UI language: English, French, German, Spanish, German, Italian, German, Russian, Arabic, Thai APP support language: English, French, German, Spanish, German, Italian, German, Russian, Arabic, Thai Package included: 1 x Smart Watch 1 x English and Chinese User Manual Other things not included