Product Description This smart bracelet wristband with 0.69 OLED touch screen display can monitor your heart rate,your steps,sleeping hour and wake you up with a silent alarm.Above all the data will be on your smart phone with Android or IOS system(Android phone:support Android 4.3 or above.IOS phone:support IOS7.1 or above.)You will be much happier and convenient to do exercise with this multifunctional wristband. Main functions: Incoming call alert Heart-rate monitor Sleeping monitor Pedometer Built-in 9 languages Calories burned display Intelligent vibrating alarm clock (WhatsAPP)APP notification Anti-lost Shake photograph One-button function(switch screen,photographic,SOS distress) Data sharing to the social platform Features: Smart wristband with 0.69 OLED touch screen shows different patterns on your phone. Compatible with Android and IOS smart phones which support bluetooth 4.1.The Android phone must be 4.3 or above and the IOS must be 7.1 or above. Monitor your sleep automatically and wake you up with a vibration alarm and more.Rechargeable battery for long time using,low consumption. The size can be adjusted according to the size of your wrist. Specifications: Color:Black Screen Size:3.5*1.3*1.1cm/1.38*0.51*0.43in Wristband Length:23cm/9.06in Package Included: 1 x Smart Bracelet 1 x USB Charger 1 x User manual