ModelIP67 Smart BraceletProduct Dimension245*23*11.8mm (Total length + case diameter + thickness)ColourBlack/Green/Red/BlueNet weight40kgBluetooth version4.0 BLEWaterproof levelIP67OpticalSC7R30,128KB+1M,Optical Heart Rate Sensor ModuleDisplay screenType:1.14 'inch Colorful displayTouch screen:Single touch controlResolution:240*135 pxBatteryType: Polymer lithium batteryBattery capacity: 90 mACharging time: about 60 minutesWorking hours: 5-7 daysStandby time: about 20 daysMaterialABS+TPUWorking temperature -20°C ~ 50°CVibration motorSupportHeart rate chipSupportMotorBuilt-in, vibration reminder