Pass & Seymour® TradeMaster® 94315-I 3-Speed Dual Rotary Fan Speed/Dimmer Control Switch, 120 VAC, 1.5 A, Thermoplastic, Light Almond

Since the development of variable fan speed controls, many fans have made an annoying humming noise when their speed was reduced. Through the use of specially designed capacitive circuitry, these units can control fans at 3 speed levels rotary style with virtually no fan motor noise.