Includes 2 changeable control knobs, one ivory and one white to match either color wall plate, (wall plate sold separately). Rotate to select light level, push on/off. Features electrostatic discharge tested, mechanical air-gap switch to disconnect load power, and RFI suppression. 3-way dimmers require 3-way switches. Rated at 120 volt AC, 60Hz, works with 120 volt incandescents and halogens. 600 watt maximum capacity. UL and CSA Listed.