The Mi Band 2 introduces a screen for the first time in Xiaomi history, and also debuts smartwatch style notifications. The 24/7 activity tracker features a 0.42-inch OLED screen that's covered by scratch resistant glass and an anti-fingerprint coating for that extra layer of protection. That's joined by a single physical button just below the display, which enables you to scroll through three different screens. Those are time, steps and heart rate information, for the record. The silicone strap holding the screen in place is made from a more breathable, anti-sweat material.

Requirements: Bluetooth 4.0 Android 4.4 or iOS 7.0 and above phones.
Fit models:
Adapter Apple iOS 7.0 or later and iPhone 4S / 5 / 5C / 5S / 6/6 Plus / 6S / 6S Plus / SE. Bluetooth phone support Android 5.0 or 4.0.