Sustainability: important in life, equally important in music! The GFW-KEYSUSTAIN by Frameworks delivers the realistic tension of a traditional sustain pedal to any keyboard or electric piano equipped with a designated 1/4” pedal input jack. The pedal operates by emulating the action of lifting the dampers from the strings on an acoustic piano, resulting in resonating notes. Rubber feet on the bottom and a non-slip, removable cover on the pedal provide a sturdy grip during performances and practice. An easy-access polarity switch on the back ensures universal keyboard compatibility.