Two sensor reversing system for cars and light commercial vehicles - takes the guesswork out of parking Uses ultrasonics to measure the distance between your car and obstacles Audible indicator of the distance to objects behind the car Automatically engages when reverse gear is selected Three distinct tones provide audible warnings of the distance to an object Choose between adhesive mounting sensors or recessed flush mounting sensors 1 pair of each type supplied Recessed flush mounting sensors require holes to be drilled 22.5mm drill hole cutter supplied for installation Package contents2 x adhesive sensors with connecting cable measuring approximately 2.3m per sensor2 x panel mount sensors with connecting cable measuring approximately 2.3m per sensor1 x in-car speaker for alerts with adhesive or screw mounting options and connecting cable measuring approximately 2.4m in length1 x control unit for installation in the boot of the vehicle measures approximately 8.5 x 4.3 x 2.4cm1 x power connecting cable red connects to the reversing light and black to earthed body of vehicle measures approximately 90cm in length1 x 22.5mm drill hole cutter1 x fitting instructions manual SpecificationsRated voltageDC 12VOperating voltage rangeDC 10.5V15VRated current300mA max.Detection distance0.11.5 metresStage 1 detection range100cm150cmStage 2 detection range50cm100cmStage 3 detection range1050cm