Features1SensorSemiconductoralcoholsensor2ControlDitigalcircuitwithMCUanalogcircuit3Warm-uptimeWithin6secondsWithin10seconds4RespondtimeWithin5secondsWithin5seconds5ResumetimeWithin10secondsWithin15seconds6Operatingtemperaturerange-10℃-50℃ 95%RH73teststepswithLEDindicationafety:under0.02%BACCaution:0.02%-0.05%BACDanger:over0.05%BACSSafety:under0.05%BACCaution:0.05%-0.08%BACDanger:over0.08%BAC8LowvoltageindicatorRedlightflashNo9SensormalfunctionIndicatorYellowlightflashNo10Countdownandcount-uptimerkeepsthedeadlineofyourparking11Torchfunction12Convenienttocarrybykeychain13Powerinput3V(2xAAAalkalinebattery,notincluded)14Power2 AAAbatteries( 200times)15Unitsize71.5mmX35.5mmX24.5mm