"The Park-Zone Precision Parking Device is an innovative precision-parking device providing solutions for depth perception and overcrowding in the home-garage. Youve never seen anything like this before. Think of it as a guidance-system for parking your car. Just hang it on your garage wall; determine your ""Park-Zone"" by setting the distance from the wall to your bumper and the Park-Zone will stop you precisely in place - at a safe calculated distance from the wall every time. When you enter the garage the green light on the display unit will illuminate green. Midway into the garage it turns amber and when the light turns red you stop - in the Park-Zone. Its that simple. The Park-Zone Precision Parking Device operates on an AC plug-in adapter or on 4 AA batteries (not included). Kit Contains: Display unit Connector cord Ultrasonic sensor AC adaptor Instruction manual"
Price: $29.95 from AutoBarn.com