Justin Chancellor Crybaby Wah. Combines three separate effects into a single pedal: a custom mid-range filter, a custom Wah circuit and a vintage fuzz. The UK Filter mode uses a custom solid-state circuit designed to emulate the unique envelope-like filtering of the tone control on Justin's own instrument. When combined with the built-in fuzz mode, the UK Filter generates incredibly smooth, synth-like tones. The Wah mode employs the classic red Fasel® inductor and the circuitry of a modified Crybaby Wah. Combined with the built-in fuzz circuit, the Wah mode cuts through with electric fire. Customize each mode with separate Volume and Q controls. This pedal is a must for the tone-crafting bass player. True hardwire bypass. Powered by 9 volt battery or AC adaptor (ECB003).