The Westinghouse Five Speed Single Commercial Ceiling Fan Control GWJ5S-U is a white plastic fan speed controller designed for indoor use. With a voltage of 120V and a frequency of 60Hz, this unit from the trusted brand Westinghouse offers 5 different speed settings for your ceiling fan. The compact size of 2.25" length, 5 7/16" height, and 3 5/16" width makes it easy to install and operate, providing a convenient solution for controlling the speed of your ceiling fan in your home or commercial space.