Mi band a very protable health tracking device, whuch has very good plastic body with superb design .the product is very light weight it can be easily straped to ur hand.very good design .
Coming to the working part its relly very intelligent tracks walking distance, sleep time, it also has an alaram with vibration very user friendly
Battery life is jst mindblowing of 30days stand buy
So all these comes at very less cost, then what else u need jst buy it and experience it! ?