One of the funkiest effects around, the Auto Q will add incredible texture and vibe to your playing. This box provides all the traditional envelope filter and auto wah sounds, but it doesn't stop there. You can also blend in the Auto Q's gorgeous shimmer effect for a totally new sound. With the Decay control, you can determine when the shimmer effect comes in, leaving, for example, staccato lines funky while adding a hypnotic throb to sustained parts. The Auto Q features rubberized, nonslip knobs for quick, on-the-fly adjustments.Power: Dunlop ECB003 AC Adapter or Single 9 volt battery