A device originally developed by Cliff Anderson. It is a collection of switches, lights, and various components that is used to control everything from fan speeds to lighting on a modded case. They can be as simple as a couple of switches, or as complex as to include LEDs, LCDs, switches, and complex circuitry, depending on the application. Usually homebuilt, but lately a few retail versions have become available.
Usually used in conjunction with a fanbus.