Essential Features of Smart Sports Watch:1 MCU: Apollo3.52 PPG Sensor support Continuous HR & SPO2 Measurement3 Dark Skin adapted measuring Fresnel light path Design Know-how4 Large Lithium polymer battery: 300mAh, up to 12 days' battery life5 IP 68 water-proof level6 OS:RTOS system7 Supports 13 UI languages, extend-able to 20+8 High-speed OTAStandout Features of sport smartwatch:1 Full skin measurement light path design2 Accurate heart rate and continuous SpO2 monitor3 Sleep status analysis and guidance4 Connect to GPS in phone5 Support off-wrist detection6 Support 16+ types Sport Options7 Women Health Cycle Tracking8 Embedded self-setting watch face, Cloud storage and User "My picture" Watch face Customize9 Music & Camera Control10 Incoming calls & msgs texts display