Features: 24 Hours Heart Rate Monitor: the built-in 8002 real-time dynamic heart rate sensor, providing low power consumption yet more precise monitor. IP68 Water-resistance with E-compass: great companion throughout your adventures, perfect choice for outdoor activities. Perfect Life Assistant: notification reminder makes your farewell to the left out message and call. Sedentary reminder, drinking water reminder and sleep monitor care for your health. Multi-sport Mode: running, walking, cycling, swimming, yoga, etc.. Precise sensor records your heart rate, mileage, calories, steps and time with target to set. High Quality Display: 1.2 AMOLED ultra-bright color touch screen with high-end resolution of 390 * 390 offers a perfect experience with clarity, brightness and agility. Note: 1. Measurement data is for reference only, not for medical use. 2. Working time varies with use and other factors. 3. Item\'s color may be slightly different due to the monitor setting or other factors, please in kind prevail. Thanks! Parameters: Screen: 1.2\'\' AMOLED Resolution: 390 * 390 CPU: NRF52840 Memory: RAM 256KB + ROM 1MB BT Version: 5.0 Compatibility: Android 5.1 / iOS 9.0 or later APP: LinkTo Sport Waterproof Grade: IP68 Built-in Battery: 3.7V 180mAh Lithium-ion Polymer Battery Normal Use: 3 Days Standby Time: 10 Days Functions: Heart Rate Monitor, Message Reminder, Call Reminder, Alarm Clock, Sleep Monitor, Sedentary Reminder, Drinking Water Reminder, Sport Mode, Remote Camera, Remote Music, Stopwatch, Two-way Look up, Compass, Calories Counter, Distance Tracking, Pedometer, Raise to Brighten Screen, Do Not Disturb