This new and expressive effect was an instant hit with players like Jimi Hendrix and Eric Clapton, who have contributed to the Cry Baby Wah s huge popularity to this day. While other effects have come and gone, the Cry Baby Wah just keeps getting better with age. Features 100k ohm Hot Potz potentiometer that allows for a quick, abrupt wah sound Powered by the Dunlop ECB-03 AC Adapter and/or 9 volt battery Heavy die cast construction for years of reliability.