The job of the transmitter is to issue commands to one or several modules and switches. Transmitters come in a variety of forms, from a simple pushbutton unit that sits on a tabletop to a control box programmed by a home computer. When managed by a timer, motion sensor, or a PC-based controller the lights are on automatic pilot. These lighting controllers require no new cabling. The newest types of lighting-control systems to hit the market use no wire at all.
Keypads communicate with lamps and switches over radio-frequency airwaves.
Because no wiring is required, wireless systems are easy to install and expand. Control The simplest type of lighting-control system requires little more than a few small boxes plugged into standard wall outlets. Controllers are available in a range of styles. The most basic is the pushbutton console. Each button of the console can send an on, off, brighten, or dim signal to various switches and modules.