A pocket sized envelope filter/dynamic auto WAH pedal with tone and versatility. Adjustible sensitivity allows response to the dynamics of different playing styles, for the preferred WAH effect. Exaggerated slap-back funk, subtle ambience, static frequency effects among many more features are all a reality with the MOOER Envelope. A 100% analog circuit brings a wholesome warm sound and a wide control range make this pedal ideal for both guitar and bass applications.