... .Stage-by-Stage Alert.Step-up AlarmIntelligent anti-interfernce alysis.Real time distance detectioin:0.3m-1.5m/2.5m.Obstacle ... parking system:LED digital parking sensor,car parking sensor,Buzzer reverse sensor,colorful LCD reverse parking sensor,voice parking system,Parking sensor:Buzzer reverse sensor,parking sensor system,car parking sensor system,auto parking system,car radar. parking sensor ...