Xiaomi is known for its smartphone devices in China and is becoming a common name in India as well. This smartband is an excellent example of how technology can be cheap. This is not only light in weight unlike many other bands that but also is waterproof and skin friendly. Even if wear for whole day, no issue of irritation. Additionally, gives vibrations for calls when far from device and sync to update you when near the device. The information is displayed on mobile screen in the app for this device. Download and install Miband app and connect your mobile device to the band. Battery standby is upto 30days. App can be installed on any android device and data is visible for one day only. Cannot see previous day data. This is a smart device and its calibrated to match with army standards. In the first few days you may feel not so desired results, as the standard set default is very high- I am talking here about the motion. The device registers motion of hand and its set as per army standard. Now, device learns with time and adjusts itself to your hand movement, and it takes some time to show real results. Since, motion sensing is the only hardware set for this device, it takes time to give correct device. Hence one needs to keep using this device continuously and probably in a month see better calculations and results in the app. This is the cheapest device available for around $10 and can be directly purchased from Mi website. Band comes in black by default but other color options are available to be purchased separately. There are lot of other options available but not at this ground breaking price.