Havana WTB-005 Keyboard Sustain Pedal For those electronic keyboards with an input jack labeled “SUSTAIN,” this is used in the same manner the sustain pedal on an acoustic piano is used. Designed to work and feel just like an acoustic piano’s sustain pedal, its specially designed rubber bottom grips the floor and stays put while you play. This can also be utilized as an FS controller for synthesizers, tone modules and drum machines. You’ll be pleasantly surprised by the performance of this model! Works with a wide variety of keyboards. It is very portable and easy to store. Recommended for those who play the piano sounds on the keyboard.