Touch type: single touch Function: Bluetooth call Call duration: 5-6 hours Built-in 90mah battery, standby time IP67 waterproof 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 Wait. Fixed languages: English (default), Chinese, etc. Remarks: This product belongs to USB cable charging mode, without charger head. Colour:Black Material:Steel Belt Package Contents: 1 x Sports Bracelet 1 x USB Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.