Everyone knows that it was the MXR Flanger that powered the timeless Van Halen tunes "Unchained" and "And The Cradle Will Rock". Now you can grab a piece of that world-class tone with the MXR EVH117 Flanger. This amazing stompbox features the same bucket-brigade technology that provided the sweeping, whooshing magic of the original. But we didn't stop there. We've also added the EVH Switch, which instantly calls up Eddie's "Unchained" sound with the exact same Manual, Width, Speed and Regeneration settings that he used to get one of the greatest guitar tones of all time. If that's not cool enough, we painted the EVH Flanger with the rocking striped graphics that started a revolution. Get the MXR EVH117 Flanger and hit the ground running.Power: Dunlop ECB004 18 volt AC Adapter or Two 9 volt batteries