Display screen1.83 inch TFT high-definition,240*280pixel CPURealtek8752x Flash64M+64M touch2.5D Full screen touch KeyRound physical buttons BluetoothBLE5.0 Heart rate sensorLC11 S+ G-sensorSTK8321 battery200mAh large capacity polymer batteries charging time2 hours Standby time 30days-35days Usage time5-7days System supportAndrews 4.4 above and IOS 9.0 above5S above Specifications: Heart rate monitoringsupport Body temperature monitoringsupport SpO2true blood oxygen BPsupport bright adjustmentsupport Raise the hand on the screensupport incoming callVibration reminder SMSdisplay OtherQQ WeChat FacebookLineWhatsApp and other reminders Multiple sports modes24 species Weathersupport Flashlightsupport Clock displaysupport Alarm clockVibration reminder music controlsupport Versatile dialsupport Dial wallpapersupport Sedentary remindersupport Do not disturb modesupport Find the braceletsupport Remote photographysupport Sleep monitoringsupport Step distance Caloriesupport Package Included: 1 * Headset 1 * Instructions 1 * Charging cable