Dynamic 'Wah' effect while playing rhythm. Cool, Funky, Twangin' 'Wah' tones created with single note solos. Double peak envelope sweep filter. Great for guitar or bass. Quick auto-reset envelope for even rapid fire playing. Innovative circuit for an incredibly responsive envelope performance. Slow/Fast toggle switch. Sensitivity/Sustain/Depth controls. Excellent dynamic response. Simple, easy to use design. 100% Analog design with True Bypass circuitry. "Effects on" indicator light. Micro pedal package - very small and compact.