Display：0.69'' OLED screen

Bluetooth：4.0

Standby time：7days 

Operation temperature：-20°C～+45°C,                            
Storage temperature：-40°C～+45°

Function：Photograph/Heart rate monitor/waterproof/Calories/Pedometer/Sleep Monitor/Bluetooth/time and alarm/Low radiation/Chinese&English

works with Android above 4.3 and iOS7.0. rechargeable battery (USB charging cable)