The Westinghouse 7787300 is a ceiling fan and light wall control. For easy operation, this ceiling fan and light wall control device replaces a toggle switch. The machine controls four fan speeds (high/medium-high/medium/low) by a simple sliding switch on your wall, eliminating the need for a pull chain. It has the ability to convert any three-speed fan into a four-speed fan. The full-range sliding dimmer switch on the wall plate is compatible with incandescent light bulbs.