Classic Audio Transponder Digital Delay - RollerThe Transponder features crystal clear repeats with delay times up to 1000ms. With the Transponder Roller you get the ability to adjust delay time with nothing more than your foot! As you move the roller forward the delay time decreases, giving you faster repeats. Add in mix and repeats knobs and the perfect delay sound is only a roll away. Reinforced Drive Belt Roller Positional LED 270 of Rotation Fully Sealed Bearing Drive System Sturdy Aluminum