ELECTRONIC LOW VOLTAGE THREE WAY TRIMMED DIMMER SWITCH. This is a three way electronic low voltage dimmer for use with 12 volt low voltage lighting. Needs to be used along with a mechanical three way switch. The top button turns the light on and off while the bottom button rotates to control the dimming of the lights. This dimmer can be put next to other dimmers in the same electrical box without trimming heat displacement plate. Rated at 200 watts.