The Park-Daddy is a precision vehicle parking system for home garages. Using infrared technology, advanced optics and innovative software techniques the Park-Daddy uses the same technology and quality as our commercial systems. The Park-Daddy will notify the driver while parking in the garage, that they have cleared the garage door opening allowing the maximum amount of space in the front of their car while minimizing wasted space behind the vehicle eliminating damage to your vehicle or valuable items stored in your garage. With the Park-Daddy aid, you can store items such as bicycles, motorcycles, freezers, lawn mowers, work benches, etc. in your garage. Unlike expensive vehicle options such as park distance monitoring or parking cameras, the Park-Daddy is the best precision garage parking aid that will allow you to set a garage door clearance with as little as one inch. You can also use the system for backing in your garage making it perfect for RVs. The Park-Daddy installs easily in just minutes. The Park-Daddy has two Infrared Head Units that mount to the garage walls just inside the garage door opening by using our peel off mounting tape or can be mounted with two screws for easy removal. The system requires four D-size batteries that last for up to one year or more. The system also comes with one RF Radio Receiver that conveniently plugs into a car's cigarette lighter power port. The RF Radio Receiver will sound with an adjustable tone and a "red" LED will illuminate when the infrared beams are broken. As soon as your car clears the garage door opening, the sound will stop and the LED will change to "green" notifying you that the car has cleared the beam and it is safe to park the car at that possession, leaving the maximum amount of room in front of your vehicle. PARK-DADDY SYSTEMS CAN BE EXPANDED UP TO 4-VEHICLE/4-STALL GARAGES WITH THE PURCHASE OF ADDITIONAL PDY-BA-RFR PARK-DADDY RADIO RECEIVERS.