Mi Band 1s  (Black Strap, Size : Large)

100% Original Xiaomi Mi band !!! Feature: * Heart rate monitor * Sleep monitor * Pedometer * Smart alarm * Notifications of phone calls Support: Android 4.4.2 or above, also supports bluetooth 4.0 iPhone 4S/5/5S/6/6 Plus with IOS 7.0 or above Specification: Battery capacity: 45mAh (10 days standby power ) Type batteries: Lithium polymer Input Current: 25mA Input voltage: DC5.0V waterproof level: IP67 Bluetooth chip: Dialog's top Bluetooth chip (Bluetooth 4.0) Sensor: ADI military gravity sensor Measurement methods: Photoelectric volume pulse wave plethysmography (PPG) Heart rate sensor: Optical heart rate sensor Equipment requirements: xiaomi 4 / xiaomi 3 / hongmi Note 4G / honmi2 / xiaomiNote / honmiNote 2 ; Adapter iOS 7.0 and above versions of iPhone 4s / 5 / 5c / 5s / 6/6 Plus. *you can wear for swimming for dept upto 1 meter and 30min as its IP67 certified *Notification of calls and messages even whatsapp facebook and so on *Deep sleep tracking very beautiful feature. Below are the steps to be followed to enable HEART RATE SENSOR Reference- http://en.miui.com/thread-187146-1-1.html 1. Install the latest Version of the MI FIt from the play store (This is very important) 2. Go to http://m.app.mi.com/ from your favourite browser. 3. Download the client 4. When the download completes, you need to install the MI Market on your phone using this apk. 5. Post installation, search for MI FIT in the Xiaomi Store that we just installed. 6. Once you search the MI FIT in the Xiaomi Store you will get an option to Update the app. Click on Update. 7. Bingo now you have the updated MI FIt app. The reason that I asked you to install the MI FIT in the first step from the play store is because Google Play store will give you english app and when you upgrade the app it will be in English only. If you have not installed the app in the first step, you will get the chinese version of the app and not english and I don't understand chinese.