First generation mi band most famous among the peoples. becouse its price so affordable. after big successor mi launch all new mi band 1s device so easy to use as previous model. mi band 1s comes with heart rate sensor. battery life so good 30 days usage as mi mention
but mi band 1s i’m not liks is heart rate sensor they sense unhearted body like box. charge is also a big disadvantage remove sensor from its belt . and not comes with wireless charging