please charge the watch before use Because the watch has been transported for a long time.About how to bind the watchScan the QR code of the watch manual through a browser or other software that can scan the QR codeDownload the watch appAuthorize to watch application APPBinding the watch can be used normallyYou need to keep the Bluetooth function and GPS on when the phone is connected to the watchproduct descriptionFitness Bracelet Blood Pressure Measurement Smart Band Waterproof Fitness Tracker Watch Women Men Heart Rate Monitor Smartband Special Features:Heart Rate MonitorBlood Pressure MonitorBlood Oxygen MonitorSleep MonitorMulti-sport ModesPedometerCall or Message ReminderCall ID DisplayInformation Push Reminder (SMS/QQ/WeChat/Skype/Facebook/Twitter/Line/WhatsApp)Auto Light-up ScreenAlert Type: VibrationOther Functions: Sedentary reminder, Camera remote control,Anti-lostAPP Name: fitpro Specification: CPU: Hs6620DBluetooth Version: BT 4.0 or aboveCompatible OS: Android 4.4 or above , iOS 8.0 or aboveOperating Mode: Touch KeyWaterproof: IP67,Not for swimming and bathingScreen Size: 1.3inch TFTResolution: 240*240 pixelsBattery Battery Capacity: 180 mAh Standby Time: About 7-10 daysUsing time: About 2-5 daysCharging Time: About 2.5 hoursCharging Type: Clamp chargingWatch language: International English APP Language: Korean,Russian,Spanish,English,German,Italian,Japanese,French,Simplified Chinese,Traditional ChineseNote: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!SMART SPORTS BRACELETSmart health expert porfessional intelligence simple fashion health companionship