The LoJack Stolen Vehicle Recovery System gives you a 90 percent chance of recovering your car quickly and with less damage. When your car is stolen, a tiny transmitter hidden deep within the vehicle tells the police exactly where your car is located so they can track it and recover it - many times within an hour. The LoJack transmitter's Radio Frequency signal is so strong it can penetrate through garage walls, steel containers, dense foliage and other places thieves may try to hide your vehicle.