Color: Black (Straps are changeable). Display: Touch Screen OLED. Total Length: 235 mm. Adjustable length: 155-210 mm. Weight: 7.0g. Battery capacity: 70mAh. Battery Standby Time: 20 days. Battery Type: Lithium Polymer. Input Current: 45 mAh (Typical) 65 mAh (Max). Waterproof: IP67 rating. Battery capacity: 70mAh. Standby time: 20 days. Batteries Type: Lithium polymer. Input Current: 45 mA (TYP) 65 mA (MAX). Weight: 7.0g. The main material: Plastic, aluminum. Waterproof level: IP67. Total length: 235 mm. Adjustable Length: 155-210 mm. Material: Thermoplastic elastomers, aluminum. Measuring method: photoelectric volume pulse wave plethysmography (PPG). Bluetooth chip: Dialog top Bluetooth chip (Bluetooth 4.0). Sensor: ADI military gravity sensor. App: Mi Fit. Language: English, Chinese.
Fitness Tracker: Monitor your activity levels, sleep patterns, and more with Mi Band 2 which can record your steps, distance, pace, calories burned and active minutes, and sync its data via Bluetooth 4.0 to the Mi Fit app
Smart Reminder: When your phone receives calls, messages or other notifications such as from Facebook, Mi Band 2 will vibrate to remind you. Simply lift your arm to view the notification icon on the display screen with caller name/ID when you receive a call
Sleep Monitor: MI Band 2 can monitor your whole sleep cycle, automatically recognize the stage of sleep (deep or light sleep) via heart rate monitoring, record the data and duration of every stage accurately, and help to analyze and improve your sleep quality
IP67 Water-Resistant Wristband Watch: MI Band 2 is durable and resistant against water splashes, sweat, cosmetics, dust and more. You don’t need to worry when doing daily routines, even when washing hands or taking a shower
Compatibility: Support for Bluetooth 4.0 and above, Android 4.4 and above and iOS 7.1 and above iOS. Install MI Fit app to get instant statistics and set alarms, notification alerts, and other functions