Dimmer uses slide to turn on and adjust the light level. Slide up to turn on/brighten, down to turn off/dim. Choose wattage/voltage above. Large controls (4.56" X 4.56") require two-gang wallbox. Wallplate included. Incandescent abbreviated as IC, magnetic low voltage abbreviated as MLV, electronic low voltage abbreviated as ELV. (Electronic low voltage dimmers require neutral wire connection.) All dimmers are single pole. Also available in different colors and sizes. Please make your selections above.