Although the bracelet can monitor your heart rate, it cannot be used for any medical purpose, just to help people lead a healthier life. All measurement results are for reference only. They are based on smart algorithms and sensors, so please do not compare them with medical devices, we appreciate your understanding. The main function: Sports functions: walking, running, Health function: heart rate monitoring, blood pressure and oxygen monitoring, sleep monitoring, pick up to answer, put down and hang up. Main functions: raise your hand and bright screen, Hall pick up and answer, heart rate test, blood pressure, blood oxygen algorithm, exercise record, sleep monitoring, calorie consumption detection, distance, alarm clock (vibration reminder), time display (pointer dial design), Call reminder, single touch, change dial. Watch parameters: Article number: B6, Strap material: belt and steel belt, Touch type: single touch, Function: Bluetooth call, Call duration: 5-6 hours, Built-in 90mah battery, standby time 7 days, IP67 waterproof, Fixed languages: English (default), Chinese, etc. Package accessories: Product box, instruction manual, smart watch, charging cable. Remarks: This product belongs to USB cable charging mode, without charger head. Note: Do not put the watch in hot water. Note: Please refer to the actual product for everything.