Mi band 3 is a smartwatch bracelet for you, especially for sports lovers. When you wear the bracelet to do exercise, such as running, climbing, all these data can be synchronized and analyzed on your mobile phone which helps you plan your exercise time and amount more reasonably. It comes with TPU adjustable wristband, giving you a skin-friendly, breathable feeling. When you sleep, it will monitor your sleep. It can also wake you up by vibrating gently. Mi band records every moment staying with you. Just to live a healthy life with it.