The Loctronics Starter Disable System is designed to interrupt the vehicles starter circuit. When the provided security key is inserted into the receptical, the vehicle will start. When the key is removed from the receptical, the vehicle is disabled. This auto security unit is very easy to use and simple to install. This unit comes with everything needed for installation. Price includes detailed instructions, 2 security keys, anti-theft window stickers, and 1 wire harness.