Come and see our amazing products. F6s uses PPG photoelectric volume description method to accurately measure pulse, capture dynamic and cardiac rhythm changes and generate professional reports. Features: Waterproof IP68 waterproof Heart Rate Monitor, Support Blood Pressure Monitor, Blood Oxygen Monitor, Sleep Monitor, Multi-sport Modes, Pedometer, Call or Message Reminder, Notification, Alert Type Vibration, Auto Light-up Screen, Stopwatch and other functions:Alarm, Calender, Sedentary reminder, Camera remote control, Anti-lost, Technical Parameters Sensor G-sensor, Heart Rate Sensor. Battery Capacity: 190 mAh Standby Time: About 25 days Using time: About 7 days Charging Time: About 3 hours Charging Type: Magnetic charging. Pls confirm with us about the packing info, stock color and exact production time before placing your order.