MXR MC404 Custom Audio Electronic Wah Wah Dual Inductor Wah WahThe Dunlop MC 404 CAE Wah Pedal has two knobs. One turns on the MXR circuitry, the other shifts the wah tone. Choose between "Yellow Fasel," a deep tone, or "Red Fasel," for the classic cry baby tone. This pedal has ideal applications for the stage, featuring kick switches on either side for hands free adjustment and an LED light to show you the pedal is live and kicking. Bob Bradshaw of Custom Audio Electronics designed the MXR MC 404 CAE Dual