Specifications: Category: Xiaomi Mi Band 2 Color: Black Wristband material: Synthetic Rubber Band buckle material: Aluminum Alloy Features: 1. After bounding the wristband successfully, it will immediately begin to record and analyze your condition of movement, sleeping, etc. 2. Touching the button to view the current time and the remaining power, detect the current heart rate, the number of walking steps, the mileage of movement (you can also customized targeted running program through APP, which can lost weight and reduce fat scientifically, effectively improve fitness efficiency), consumption of heat, sedentary reminder, and message and phone-call reminder. 3. When the touch operation is not convenient, raise your wrist, the wristband will automatically display the current time (need to operate in the APP). 4. Each new Mi Band 2 is an independent ID, when Android mobile phone close to Mi Band, you can unlock the phone through the wristband. APP download: Scan QR code to download Wireless connection: Bluetooth 4.0 BLE Bluetooth frequency: 2.4Ghz Bluetooth connection distance: 0-10m Device requirements: Android 4.4 or iOS7.0 and above devices that support Bluetooth 4.0 APP download: Scan QR code to download Wireless connection: Bluetooth 4.0 BLE Bluetooth frequency: 2.4Ghz Bluetooth connection distance: 0-10m Device requirements: Android 4.4 or iOS7.0 and above devices that support Bluetooth 4.0 Display: 0.42 inch OLED display Power supply: DC 5V 65mA Waterproof: ip67 Battery capacity: 70mAh Battery type: Polymer battery Standby time: 20 days Bracelet body size: 3.7 * 1.3 * 0.8cm Size: Wristband length 235mm Packing list: 1 x Wristband 1 x Wrist strap 1 x Charging cable 1 x Manual and three guarantees Actual photos are included.