Support drop ( NO invoices, QR codes, promotions or brand name logo included) This wearable device collect data through electronic sensors. - Please do not use it as a professional medical equipAdultt. It is not a medical device! - Before use, scan the QR code in the user Adultual to download the APP and connect it to the watch using the application.(see below for QR code) -For Android users: please always authorize access to the phone for the APP. and always keep the APP open. And please enable GPS on your phone before connection. USB Quick Removal Direct Charge (no charger included) Brand new bracelet charging method, quick-release detachable wristband design, can be charged by plugging in the USB interface, eliminating the trouble of carrying a charging cable and charging stand. Special Features 1.Heart Rate Monitor 2.Sleep Monitor 3.Multi-sport Modes 4.Pedometer 5.Call Message Reminder 6.Incoming contact number display 7.latest message display (social medias, included but not limited to SMS/QQ/WeChat/Skype/Facebook/Twitter/Line/