The Beat Bars FS3 is a robust, universally applicable dual footswitch with MIDI and USB connections. Via USB the FS3 is connected to the computer and at the same time alternatively powered in MIDI mode. The free MIDI configuration tool, available for MacOS, Windows and Linux, lets you define which action should be performed. So it's easy to start and stop the DAW with the FS3 via USB eg. or to tap in the tempo with the foot via MIDI at a Groovebox. The side-mounted selector switch determines whether the FS3 is in USB or MIDI mode. In the latter mode, power must still be supplied via USB; a power supply is not included.