Sturdy construction with rubber feet to keep firmly in place on various surfaces. The high quality style chrome-plated pedal gives you the feel and control of a traditional piano sustain pedal. Polarity switch allows you to toggle between sustaining and cutting your notes, giving you more flexibility in your playing style. Plug straight into your electric piano / keyboard with the 6.3 mm (0.25") jack. No need for external power. Compatible with most electric pianos and keyboards.