Android 4.4 and above, IOS 8.4 and above
Bluetooth 4.0 
Screen display: 1.3inch TFT                                                          
Battery Capacity: 90-150mAh                                                                                       
Function: Steps, Distance, Calorie, Heart Rate, Blood Pressure,
Blood Oxygen, Notification, Sleep monitoring, Sedentary reminder，
Sports, Find Phone, Stop Watch, Remote selfie       
Chargeing Time: 2 hr                                                                                                    
Standby Time: 7 days                                                                                          
Waterproof level: IP67                                                                                                    
App: FitPro