Description:
Light-sensitive version of real-time monitoring of heart rate, movement science
Bracelet body size: Show as pictures
Adjustable length: 15.7+20.5cm/6.18+8.07inch(approx)
Metal material: full magnesium alloy
The main body case: Polycarbonate
Body weight: 5.5G
Battery Thickness: 8mm
Battery Capacity: 45mAh
Batteries Type: Lithium Polymer
Input Current: 25mA (TYP)
Input voltage: DC 5.0V
Bluetooth Version: 4.0 Waterproof grade: IP67
Wristband Material: Dow Corning TPSiV heart rate sensor: Optical heart rate sensor
Measuring method: photoelectric volume pulse wave plethysmography (PPG)
Bluetooth chip: Dialog's top chip Bluetooth (Bluetooth 4.0)
Sensor: ADI military gravity sensor
Device Requirements:
Android 4.4 and above, and supports Bluetooth 4.0 Android smartphones;
Fit models:
Millet 2 / 2S / 2A, millet 3, 4 millet, millet Note, millet 4C, red rice 1S, red rice 2 / 2A, red rice Note, red rice Note2.
Adapter Apple iOS 7.0 or later and iPhone 4s / 5 / 5c / 5s / 6 / 6 Plus.
Bracelet unlock Supported models:
Millet 2 / 2S / 2A, millet 3, 4 millet, millet Note, millet 4C, red rice 1S, red rice 2 / 2A / 3, red rice Note / Note2 / Note3, Bluetooth phone support Android5.0 above 4.0.
Packaging size: 97mm * 97mm * 31.3mm Package contents: body bracelet, wrist strap, charger, manual
Package included:
XiaoMi bracelet * 1
Charger * 1
In an original box

Notice:
1. It is manual measurement, there may be 0.1-1inch error.
2. And item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same. hope understanding.