Remote control systems and components thereof - namely radio controls for garage and warehouse entrance doors or gates, automatic garage door openers, lights, motors, antennas, transmitters, receivers and controllers responding thereto and used in such systems; Electrical safety equipment, namely, an electric eye for sensing obstructions and controlling doors; Electronic security devices, namely, electronic controls for granting access and egress through doors or gates; Radio receiver units, radio transmitter units, keypads and card readers; a centralized automated system comprising a programmable controller, power line carrier modules, and one or more control modules or control receptacles, for controlling audio equipment, lighting, and other appliances in a residence; access control systems, comprising speakers, microphones, memories for storing telephone numbers and corresponding code numbers, electric luminescent display panels and liquid crystal display panels, keypads, autodialers, gate/lock control circuitry and vandal resistant housings, for establishing communication between persons in a secured location and persons desiring to enter the secured location through a locked gate or door