Features:<br>Display: 0.66" OLED screen <br>Bluetooth Version: Bluetooth 4.0 <br>Alert Type: Vibration <br>Main Functions:Heart rate monitor, Pedometer,Calorie,Nap reminder,Sleep monitor,Call reminder,SMS notification,Exercise Modes (Running,Biking,Basketball,Football,Kongfu,Kiking,Dancing,Yoga,Golf),Engery Conversion,Date and time display.<br>Battery : 180mAh <br>Charge time: 2 Hours<br>Work time: 8-10 Days (Work time will depend on the actual using situation)<br>Continuously heart rate monitoring: 40-48 Hours<br>Waterproof level:Life waterproof (Not for shower or swimming)<br>Compatability: Android 4.4 / iOS 7.0 and Above System <br>Available Color: Black,Blue,Yellow<br><br>Package Included:<br>1 x X11 Smart Wristband<br>1 x English User Manual