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QinHeng ElectronicsUSB Foot Pedal for a PC by QinHeng Electronics - device OS independent (Linux, Windows, etc).This is a series of foot pedal switches that appear unbranded and are sold on ebay. There is a single pedal version and a three pedial version. The foot switch connects to the computer by a USB interface. The foot pedal is programmed into its own firmware with a character or string that will be sent to the computer via input I/O when depressed, much like a keyboard does when a key is depressed. Consider that it functions like a keyboard which has only a single key.Programming software included with the device is Windows only even though the devices is marketed as OS independent. An independent developer created a utility using the C programming language and can be executed on Linux.