Applied to bass, the Cry Baby 105Q Wah Pedal is a wholly unique effect. 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 that lets you alter the wah parameters. Powered by the Dunlop ECB03 AC adapter and/or 9V battery, not included.