This is a DanElectro  Dan Echo with a "Speed" knob modification. I removed the speed knob and pot on the pedal, ran an shielded cable to a 1960s volume pedal off an organ, and created a controllable speed control via your foot. The new pot on the foot controller is high quality and heavy duty, and the foot allows for speed control at any time, allowing for that slow-to-fast warping echo found on analog echo units. THIS PEDAL RUNS OFF OF 9 VOLT BATTERY OR WALL UNIT, NEITHER OF WHICH ARE INCLUDED. Additionally, THE 9 VOLT COVER PLATE IS NOT INCLUDED. Thanks a lot!f