The great-value KILO-WAH is a versatile pedal with four on-board wah effects. The pedal features a classic wah sound, the renowned MEGA-WAH sound with fattened bass, wider sweep and boosted resonant peaks, an auto-wah and finally a funky note-triggered wah which is an envelope filter that actually sounds musical. The pedal is activated by a noise-free, wear-free optically-linked pedal mechanism.