Strattec Security’s i-Guard is a radio-frequency identification (RFID) electronic immobilizer system developed for the construction, fleet, and rental equipment industries to prevent equipment theft and to keep machinery secure at any location. Available as a key or fob system, i-Guard features a unique electronic code programmed into the engine module and into a chip in the ignition key or fob. The code is transmitted between the two components by a small antenna via difficult-to-mimic radio frequencies. When a key is inserted into the ignition or fob used with a push-start button, the vehicle requests authorization. The system module then searches for the transponder, and the transponder responds with the correct code. The system verifies the transponder code and communicates back to the vehicle module that it is authorized.