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 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.
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