Features: Automatically start When the gear lever is engaged in the reverse gear, the reversing sensor automatically starts working, and the ranging range is 0.3 to 2.5 meters, so it is very practical for the driver when parking. 4 sensor andadvanced chip set 4 sensor system, double CPU and advanced chip set for enhanced coverage and monitor(0-2m). Help to prevent dangerous and costly collisions.Anti-freeze andrain -proof The car parking system is anti-freeze and rain proof, which is not afraid of the bad weather. Low item monit o r The car parking system is good at finding small children and low walls as well to avoid unnecessary accident. Safety guarantee Help to provide increased safety for passengers, pedestrians and family members who happen to be around the moving vehicle. Digital screen With digital colored LED display (number & light), the car parking system is easy to read. EasyI nstall ation A saw drill head and two stickers are included in the package. It is easy to install the car parking system. Packing list 1*Main Control Box 1*LED Displayer 4*Parking Sensors with 2.5M/8.2ft Line 1*Hole Saw 1*A saw drill head 1*Power Cable 2*Double Side Sticker 1* Package box