How Much Do You Know About Remote Controls? February 28,2017.

Earlier remote controls in 1973 used ultrasonic tones. The remote control code, and thus the

required remote control device, is usually specific to a product line, but there are universal

remotes, which emulate the remote control made for most major brand devices.

Door opener remote key fob
Remote control is a convenience feature for the consumer, and can allow operation of devices

that are out of convenient reach for direct operation of controls. The remote control contains all

the function controls while the controlled device itself has only a handful of essential primary

controls.


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