IllumaTech Preset Dimmers and Fan Speed controls feature a low-profile fluid slide bar movement for fine adjustment of light levels or fan speeds that's accompanied by an easy-to-use on / Off preset switch. The switch provides quick on / Off control without disturbing your favorite pre-selected settings. Most feature a built-in LED locator light, as well. Models are available for incandescent, magnetic or electronic low-voltage, and Mark 10 Powerline dimming-ballast fluorescent lighting, and quiet and standard fan speed control. All Preset models are designed for both single-pole (one-location) and 3-way (multi-location) applications.