Battery capacity: 70mAh Standby time: 20 days

Battery capacity: 70mAh Standby time: 20 days Battery type: Lithium polymer Input current: 45 mA (typ) 65mA (max) Weight 7.0g Sensor material Plastic, aluminum alloy Water-resistance IP67 Configuration 0.42" OLED display Bluetooth 4.2 BLE Power-efficient accelerometer Photoelectric heart rate sensor Band Total length: 235mm Adjustable length: 155-210mm Material: Thermoplastic elastomer, aluminum alloy Compatibility Devices with Android 4.4, iOS 7.0 or above with Bluetooth® 4.2 support Compatible phones: Devices with Android 4.4 and above, such as Mi 3, Mi 4, Mi 4i, Mi 5, Mi Max, Redmi Note 4G, Redmi Note Prime, Redmi 1S, Redmi 2, Redmi 2 Prime, Redmi Note 3, Redmi 3S, Redmi 3S Prime, Redmi 3S+ Devices with iOS 7.0 and above, such as iPhone models 4s and later. Note: Mi Band's phone unlocking feature requires smartphones with MIUI or Android 5.0 and above. ref: wcgqyp.511@12341234.com