I bought this band 2 days back and after using it, now I am gonna tell you its ( +) (-) .
This is a simple fitness tracker from a chinese company xiaomi which has a cost 1999 indian rupees and you can buy it from amazon.in and mi.com website.
This band is further upgradation of mi band 1 which has a cost 999 indian rupees.
Now this band is having 25 days battery back up and it is dust proof, water proof and having vibration facility in it.
The band is connected with the software with your phone and if you want to track your activity you have to open the app in your phone.
This band contains a small screen with a button which is used to check the time, steps and calls.
Now the problem which I faced is that the steps count is not correct as it is simply based on how you swing your hands while walking and if you are walking without swing your hand then it can't counts your step.
The second one is that if you sleep in afternoon then it can't count that part of sleeping as it is programmed timewise for sleeping period.
Heart beat tracker is always shows different reading till if you are measured it countinously.
So I think the tracker is the cheapest in the market with lots of features but if it is not accurate then this is useless.