Features: System activated automatically when reverse gear is engaged. Bulit-In Buzzer Type. Stage-by-Stage Alert. Step-up Alarm Intelligent anti-interfernce alysis. Real time distance detectioin:0.3m-1.5m/2.5m. Obstacle orientation of wrong connection. All weather design enable operation in the most extreme environment. Shockproof,Wetherproof,and Dustproof. Easy to Install. Intuitive and easy to use. Suitable for all cars,SUV,Van,4*4 Real Time Response 12 months warranty Technical Specifications: Working vopltage:DC 12V+(-)2V Max power:Pmax5W Wide Operating Temperature Range:-40-(+)80 Display and alarming distance:1.5m/2.5m Sensor installation height:50-70cm Sensor installation mode:built-in Alarm volume:80dB at 10cm Ultrasonic frequency:40KHZ Also Available: 2,3,6 or 8 Sensors Systems 24v Systems for Special/Heavy Vehicle Large selection of colors Variety of Sensors:e.g.flashing,fluorescent sensors OEM,ODM Services. Car 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.