Featuresr skin closed material comfortable and safe to wearr 091inch oled hd high sensitive touch screen display 12832pixelr ble 42 ultra low power bluetooth chip and 3d acceleration sensor excellent performancer ip65 life waterproof level swimming and taking shower not suggestionr 85mah large lithium ion battery capacity long standby timer compatible with ios 71 above or android 43 above devicesr r functions r bt phone calling reminder sms remind android platform wechat r