Xiaomi Mi Band 1S Heart Rate Monitor Smart Miband Pulse 2 Wristband Bracelet Fitness Wearable Tracker Smartband Six Colors;

Battery capacity: 45mAh
Standby time: 10 days
Batteries Type: Lithium Polymer
Input Current: 25mA (TYP)
Input voltage: DC5.0V
Waterproof: IP67
Heart rate sensor: Optical heart rate sensor
Indicator lights: white
Adjustable length: 157~205mm
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, Russian, Spanish, Polish, Portuguese, Turkish, French, German

Device Requirements:
Android 4.4 and above versions, and supports Bluetooth 4.0 for Android smartphones;
Adapter For Apple iOS 7.0 or later and For iPhone 4s / 5 / 5c / 5s / 6/6 Plus / 6s / 6s Plus.

Bracelet unlock Supported models:
Xiaomi 2 / 2S / 2A, Xiaomi 3, 4 Xiaomi , Xiaomi Note, Xiaomi 4C, Redmi 1S, Redmi 2 / 2A, Redmi Note, Redmi Note2
(need to upgrade to MIUI6 and above systems), Bluetooth 4.0 Android 5.0 over the phone.

Packing List: mi band 1S chip, black wrist strap, charger, user manual.