* Works with Windows Phone 8.1 update, iOS 7.1 or later, and Android 4.3-5.0 phones, with Bluetooth. Microsoft Band app required; available in English only.
** Step tracking capabilities work with Windows Phone Lumia devices with Sensor Core V1+ and Cyan FW, iPhone 5s and later, and Android 4.4+ phones with support for Step Counter API. Microsoft Band app available in English only.