The Mi Band 2 is a fitness, sleep and heart rate tracker. Extremely affordable yet with rich features and high-built quality. Its slim form factor, light weight (19 g), soft material, and water resistance allow the user to comfortably wear it 24 / 7. The OLED display offers essential information such as time, caller ID and steps. The display is also hidden underneath the black front panel to achieve an integrated appearance. The metal plate with turned texture is not only the visual highlight of the product, but also serves as a touch button. The user can switch between information by simply tapping it. The battery lasts 20 days with one charge.