Product attribute Master Chip:NRF52832ECG:Ti129PPG chip:Silicon labsVirbation:Loundspeaker Mute/VibrationWaterpfoof Level:IP68Compatible System:Android 4.4 and aboveiOS 8.2 and aboveSpecial Features:Body temperature, ECG, blood pressure, blood oxygen, multi exercise mode Health care function Main Feature:Temperature monitoring function,ECG function,Health monitoring of heart rate, blood pressure and blood oxygen,Environmental protection TPU strap, no sense of wearing,HD resolution 1.08 color screen, dynamic and simple UI interface,MultiSport mode (running, cycling, swimming, badminton),Sleep monitoring,Global font content push,Turn over the wrist and light up the screen automatically,USB plug and play charging (without data cable) Other Functions:Body fat, step counting, calories, distance, sleepmonitoring, exercise patterns, caller alerts, alarm clock alerts, hand-up display, social sharing (Wechat, Facebook, Twitter, etc.)Shake the picture, sit for a long time to remind, look for. Screen Type:TFTBLuetooth:4.0 BLELow powerBattery Type:Polymeter Lithium BatteryBattery Capcaity:105mAhCharging Type:USBCharging Time:About 2 hoursEnduranceTime:Can use 5-10days Standby Day: 20-30daysManipulation Mode :Touch operation, mobile app controlPacking:Rings, instructions, packing boxes, certificatesWarm reminder Please remember that due to the lighting effects, the monitors brightness / contrast settings / etcs, there will be some slight differences in the color of the pictures and the actual items. Measured by hand, deviations of 1-2 cm are possible.