The Studiologic VP26-U Universal Volume Control Pedal is the first of a new generation of keyboard volume pedals. IThe volume pedal uses a special, custom-made potentiometer to control instrument volumes for at least five different brands of keyboards. The Studiologic VP-26U pedal can truly be defined as a "universal" volume controller. Together with its special potentiometer, the Studiologic keyboard volume pedal has a small polarity switch located immediately below the pedalboard and assembled directly onto the pedal shell.