Xodus Innovations AR145D Carlon Thomas and Betts 4 Level Touch Lamp Dimmer Plug, White Converts any lamp with metal to a touch dimmer by simply plugging into a standard outlet. Only one dimmer should be used in the same circuit. Saves money and energy by eliminating the need for expensive 3-way bulbs Easy to use, just plug the lamp into the dimmer and then plug the dimmer into the outlet. Compact design with convenient side outlet for lamp cord extension Dimmer size 4.25"x1.5"x1.75"