Designed for use with the DMX RGBW Decoder (sold separately), this controller fits in standard wall switch boxes and provides on/off control as well as fixed levels of light intensity. This RGB controller has a color-selection wheel for thousands of color options, 0-100% dimming, on/off controls, and 4 color-specific channel controls for red, green, blue, and white. Adjust color, brightness, speed for 3 zones. No flickering, no signal wiring. The dimmer transmits an RF signal to the wireless receiver from up to 50 feet away in open air.