Android 4.4 and above, IOS 8.0 and above
Bluetooth 4.0 
Screen display: 0.86inch OLED                                                          
Battery Capacity: 45mAh                                                                                       
Function: Step Record, Calorie, Heart rate test, SMS
Other functions: Wear detection, Stopwatch, Countdown                        
Chargeing Time: 1 hr                                                                                                    
Standby Time: 15 days                                                                                          
Waterproof level: IP67                                                                                                    
App: Yoho Sports