Xiaomi Mi Band 2 Miband with OLED Display Wristband Bracelet Smart Heart Rate Fitness Activity Tracker 20 Days Standby Time, Black

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.