Mi band 2 with a strap,you can change two colors anytime
0.42" OLED display screen with touch button control. IP67 Waterproof and dust-proof Design, battery lasts for a long time
Compatible material and light weight make you can't feel its existence nearly when you are sleeping. It can monitor your sleep time and sleep quality, record your time of deep sleep and light sleep accurately.
Syncs with Google Fit,Syncs with activity tracker / fitness / sleep tracker app to improve your lifestyle.
English instruction and Q&A manual help you use the device.