The Ravelco Anti Theft Deviceis installed in an easily accessible place under or flush mounted in the dashboard of your vehicle. A removable 16 pin male plug (which when not in use connects to your key chain) makes all the electronic connections. A hidden armored steel cable protects the wires from the rear of the RAVELCO base on through to the engine compartment where all the connections are made and camouflaged. When the plug is removed from the RAVELCO, it is impossible to start the vehicle. There are more than 100,000 different combinations. NO MASTER PLUGS. An impossible obstacle for even the most persistent thief. Read more.