Features: It automatically measures the current heart rate at every second, 24 hours continuous monitoring day. 0.96 inch touch color screen, high resolution images. Remind you if there is a message or a call coming. Record the steps into your bracelet every day. It will automatically monitor and analyze your whole sleep quality. Support life waterproof and Stopwatch function. Support Android 4.4 and above, IOS 8.4 and above, BT 4.0 version. Parameters: Screen: 0.96 inch Color TFT Chip: NRF 52832 Rom: 512k Ram: 64k G-Sensor: 3-axis BT: BT 4.0 System: Android 4.4 / IOS 8.4 and above Charging: USB Charging (about 2 hours) Battery: 80mAh Li-ion battery Working time: 7-10 days Standby time: 20 days Language: Simplified Chinese, Traditional Chinese, English, German, French, Spanish, Portuguese, Italian, Japanese, Russian, Korean Main functions: Color display,Time/Date, Step count, Continuous Heart Rate Monitor, Real-time Heart Rate Warning, Splash-proof, Calories burned, Distance, Alarm, Sleep monitor, Call reminder, Message reminder, Sedentary reminder, Stopwatch, Phone search, Rase Wrist to See Real time Heart Rate,etc.