Product Parameter Product ModelG20 Master ChipnRF52832 SensorBST BMA253 ECG ChipTI PPG ChipHRS3300DS VibrationLoudspeaker Mute Vibration Waterproof LevelIP67 Compatible SystemAndroid 4 4 and above IOS 8 2 and aboveBase ParameterSpecial FeaturesBlood Pressure Heart Rate ECG Care FunctionsCan share real time data with families Main FeatureWearable Hardware Smart App Big Data Cloud Service Turn over the wrist to change screen Monitor our body health value find and detecthealth data display risk status and evaluation results Other FunctionsStep calories distance sleep monitor sport call reminder alarm reminder raise your hand the watch light social share Wechat QQ Facebook Twitter Shake hand to take photoScreenScreen Size0 73inch128 88 Screen TypeOLEDConnect Parameterbluetooth4 0BLE Low power Other ParameterBattery TypePolymeter Lithium Battery Battery Capacity110mAh Charging TypeClasp type Charging TimeAbout 2 hours EnduranceTimeCan use 10 days Stand by day 20days Data Save Time3 months Manipulation ModeFull touch control mobile phone APP control LanguageMainly English MaterialFront Shell PC Back Shell ABS PC Belt TPU Colorblack colorPackingPackingSmart watch Charging cable Instruction Packing box Product NW23 2g Box Size23 5 2 0 12 2 0cm L W Thickness Product ParameterBase ParameterProduct ModelG20 Master ChipnRF52832