Features: ECG + PPG Monitor: advanced chips to get more accurate results, and you can view historical EKG with normal range value in APP. SpO2 Tracking: red light + infrared dual detecting for blood oxygen saturation. Blood Pressure Heart Rate Detection: easy to measure with a single click. Check the previous data through APP. Scientific Sleep Monitor: automatically monitor and analyze sleep quality at night, even a short sleep during the day. Vibrating to wake you up when low SpO2 detected. IP68 Water-resistance: great companion throughout your adventures, perfect choice for outdoor activities. Notification Fitness Tracker: phone/ message/ memo reminder makes you farewell to the left out important events. Smart bracelet supports various sport modes and measures your steps, calories, distance data during your workout. Remote Camera: shake or click the watch to shoot, perfect to take selfie with your friends and capture the very moment of your life. Note: 1. Measurement data for REFERENCE only, NOT FOR MEDICAL USE. 2. Working time varies with use and other factors. 3. Item\'s color displayed in photos may be showing slightly different on your computer monitor, since monitors are not calibrated same. Parameters: Screen: 1.14\'\' TFT Resolution: 135 * 240 Chip: nRF52832 App: WoFit BT: BT 4.0 Compatibility: Android 4.0 / iOS 9.0 or later Built-in Battery: 3.7V 130mAh Lithium-ion Polymer Battery Input: 5V 100mA Charging Time: 1-2 Hours Standby Time: 4 Days Waterproof Grade: IP68 Functions: ECG + PPG Monitor, Blood Oxygen Saturation Detection, Heart Rate Monitor, Blood Pressure Monitor, Message Reminder, Call Reminder, Remote Camera, Sedentary Reminder, Sleep Monitor, Calories Counter, Stopwatch, Pedometer, Distance Tracking, Alarm Clock, Sport Mode, Countdown, Phone Look up