tinix Heart Rate Wrists Bracelet Bluetooth 4.0 with Sleep Monitor Smartband (Black Strap, Size :)(Black Strap, Size : Adjustable)

Dynamic heart rate monitoring: optical heart rate detection. Steps: Calories, calories, steps. Sleep monitoring: according to their own conditions to open sleep monitoring. Call alert: vibration alert when incoming call. Information reminder: SMS, micro message, QQ information vibration. Time display: You can check the time with your hand. Smart alarm: you can add alarm in app. Bluetooth connectivity: Use cutting-edge Bluetooth solutions. Specification: Battery capacity: 70MAH Standby time: 300 hour Input voltage: 5V Texture of material: Plastic ABS Watch strap: TPU Elastomer Total length: 235mm width: 19mm screen: 0.42 inch OLED Bluetooth: Bluetooth 4.0 Touch: Touch mode button Waterproof level: Life waterproof (Not for shower or swimming) Sensor: Low power acceleration sensor Time : OLED show 24style Charging interface: USB socket Alarm clock: cell phone intercalate ( clock) APP: DroiHealth Control type : Button control, APP control Compatibility: Android 4.4 / iOS 8.0 and Above System Color: Black