(J&D MFG) Variable Speed Control for J&D variable speed fans gives you the ability to control multiple fans from one switch. Control utilizes full-wave control circuitry to minimize power loss and reduce energy requirements while you control your variable speed fans. Built in on/off line switch. RFI noise suppression filter. Flame retardant ABS enclosure. All models mount in a standard 2" x 4" electrical wall box. Use for Shaded Pole, Permanent Split Capacitor (PSC) and Universal AC/DC motors. UL/CUL listed. 120 volt.