M4 Smart Band Wristbands Fitness Tracker Health Heart Rate Blood Pressure Bluetooth Sports Bracelet smartband
Wearable devices control the work of a person through electronic sensors, and they are at the level of consumer electronics. This is normal for a certain deviation. The user must objectively process the data. – Please do not compare with hospital equipment about reading, this is not a medical device! – Before use, scan the QR code in the manual to download the application and connect it to the watch using the application. -For Android users: please always authorize the application access to all functions of the phone and always let it work. And please enable gps on your phone before connecting it. – Please charge it within 2-3 hours when you receive it. After a long delivery, it was turned off. Thanks!