Take control and protect your vehicle with LoJack. The patented LoJack System includes a small radio frequency transceiver hidden in up to 20 places in a your vehicle. Each LoJack System has a unique code that is tied into the Vehicle Identification Number (VIN). When a theft is reported to the police, a routine entry into the state police crime computer results in a match of the LoJack System's unique code against the state VIN database. This automatically activates the LoJack System in your car, which emits an inaudible signal. Law enforcement authorities who are equipped with LoJack vehicle tracking units - in their police cruisers and aviation units - are always listening for a LoJack signal. Police use the LoJack vehicle tracking units to track and recover your LoJack equipped vehicle.