The Dunlop Cry Baby 105Q Bass Wah Pedal is a wholly unique effect masterfully applied to bass. Adds a growling, funky new dynamic to your sound. Customized circuit for the bass guitar, a 100kOhm Hot Potz potentiometer, sturdy die-cast body, and a Q dial lets you alter the wah parameters. The Dunlop Cry Baby 105Q Bass Wah Pedal is powered by the Dunlop ECB03 AC adapter and/or 9V battery, not included.