Wiring Device-Kellems, RSFSQFW, Fan Speed Control, 1-Pole Standard, Series: RSFSQF, 120 VAC, 1.5 A, 180 W Power, 3-Speed Slider/Variable Operational Mode, Threaded Mounting, Lead Wire Terminal, 32 to 140 deg F, Plastic, White, Environmental Conditions: 32 to 104 deg F, 2.12 in W x 1.39 in D x 4.13 in H Dimensions