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 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! Uses a larger 1.3-inch display, larger words, clearer, high-sensitivity touch, screen can achieve various operations, smart call reminder, Bluetooth camera, steps, calories, sleep monitoring Bluetooth music, heart rate quickly view various functions, and the touch operation of the

  Features: 1.ADJUSTABLE SIZE:3 Size Available.Figure 8 Back Posture Corrector with breathable and latex-free adjustment strap.   2.OVERALL CORRECTION:Shoulder Support Brace Pull back your Upper Back to the right position. And then improve your whole body posture during work or life.   3.USE ANYTIME:You can use it not only when you are sitting on computer or driving a car, but also when you are playing sports or gardening. What is more, you can use it at home when you are doing housework, or watching TV.   4.PRACTICAL:Posture brace filed with Lightweight neoprene,can be worn comfortably under or over clothing.Correct your posture all day.You can put on and adjust by yourself.    5.USE DAILY:This lightweight back support should be worn daily. First couple of days wear it for 10-20 minutes only, than add 10 minutes every day. Your back and shoulders will slowly adjust and you will build muscle memory for the right posture.       Functions: Muscle pain relief The coronal and lumber sectio