I m sharing this review after a complete 3months of use, this device turned out to be a good competitor among costly wearable devices like fitbit. As comparing it to other xiaomi 1, 1s and then mi band 2 its a upgradable version with a oled display and a dedicated feather touch button including all the fitness application like calories burned , walking, especially the heart rate sensor shows the actual readings without an error thats good to be offered by a such a cheap 2k worth device. Amazing battery life if not connected to bluetooth. Ip6/7 resistant that makes a good competition to other fitness band. My verdict its really cool way to track your health with a less amount of spending money. 4.5 out 5.