Featuresr skin closed material comfortable and safe to wearr 086inch oled hd high sensitive touch screen displayr ble 40 ultra low power bluetooth chip excellent performancer ip67 life waterproof level swimming and taking shower not suggestionr 50mah lithium ion battery capacity long standby timer compatible with ios 71 above or android 44 above devicesr r functions r activity trackingstep pedometer calorie burnt distance automatic sleep monitoring call alert message aler