1.35-inch high-definition round large screenSupport Bluetooth call, dual Bluetooth system, call Bluetooth 3.0, watch Bluetooth 5.0The single Bluetooth connection is used for 6-10 days, the dual Bluetooth connection is used for about 3-6 days (the connection is used according to personal usage), and the theoretical standby is 20 days. Continuous call or music playback for 5 hoursHealth management and information synchronization functionWalking, running, riding, skipping rope, basketball, swimming, badminton, football, 8 sports modesRotating button, easy to controlLeather strap design, comfortable to wearSpecification:Hardware categoryDescriptionInformationMain chipRealtek 8762DT+JL AC6959AAccelerometerSC7A20Heart rateTianyi Hexin 3300 high-precision hand-rate module, hand-rate detection + high-pressure detectionScreenScreenIPS Color ScreenScreen size1.35 inch round screenResolution390x390Offline paymentAlipay payment codeblood pressureBlood pressure measurementSupportBlood oxygenBlood oxygen measurementSupportDynamic heart rateExercise heart rate curveSupporttouchFull touchSupportbuttonSwitch machine key + return key + encoderSupportAmbient temperatureOperating temperature10-50ChargeDedicated charging cableSupportBluetoothDual Bluetooth for calls, Bluetooth 3.0 for calls, Bluetooth 5.0 for braceletsSupportbattery capacity280mAhFully charged in 2 hoursSystem software categorydescribeInformationAPPDa FitDa FitAndroid systemSupport Android 4.4 and aboveDa FitIOS systemApple IOS9.0 or aboveDa FitPedometer/caloriesSupportSleep monitoringSupportVibration motorSupportAlarm reminderSupportIncoming call rejectionSupportCall answerSupportBluetooth callSupportplay musicSupportRaise your hand to brighten the screenSupportScreen brightness adjustmentSupportWeather synchronizationConnect to APP synchronizationSupportContact synchronization8 contacts can be synchronizedSupportBluetooth dialDial directly from the watchSupport