A remote controller is capable of transmitting different control signals for controlling an anti-theft device on an automobile, and includes a controller circuit disposed in a casing, and a function key set and a function display unit mounted on the casing and connected electrically to the controller circuit. The controller circuit includes a processor unit and a transmitter circuit connected electrically to and controlled by the processor unit so as to transmit the control signals wirelessly. The function key set includes a function select key operable so as to control selection of the control signals by the processor unit. The function display unit is controlled by the processor unit to provide a visual indication corresponding to a currently selected one of the control signals.