GENERALFEATURESSPECIFICATIONS一般功能和規(guī)格AR-819ThreeStagesLEDindicationFor CarParking三種顏色Led停車提示AudioIndicationForCarParking 停車聲音提示GreenLightForCarParking 5米距離綠燈提示YellowLightFor5MetersIndication 5米距離黃燈提示RedLightAndAlamSoundOnFor0.5MIndication 0.5米距離紅燈及警報提示DifferentLightCorrespondingDifferent BiBi sounds不同燈對應不同聲音提示UltrasonicFrequency38.5-50khz超聲波頻率AutoCaliberationWhenPowerOn 開機自檢功能LowBatteryIndication 低電顯示