Abstract: A home and auto security system that enables a user to activate and deactivate various items, such as the locking and unlocking of a door, the turning on and off of lights, and the activation and deactivation of a security system, with the use of a wireless transmitter in a key fob. The key fob includes various buttons such that when depressed, signals are transmitted from the key fob. A receiver/controller is positioned in a building or home and a vehicle, such that upon the reception of a signal from the transmitter of the key fob, a predetermined function is carried out by the receiver/controller. The key fob includes a security device to prevent unauthorized users from operating the transmitter in the key fob.