The Used Electro-Harmonix Micro Q-Tron Envelope Filter Effect Pedal delivers rich, dynamic auto-wah effects with smooth response and expressive tone shaping. In great condition, this compact pedal features a simple three-knob control layout: Mode, Q, and Drive, allowing precise adjustment of sweep, resonance, and sensitivity. Its responsive envelope filter reacts to your playing dynamics, creating funky, vowel-like filtering effects perfect for guitar, bass, and other instruments. The pedal offers Low Pass, Band Pass, and High Pass filter modes for versatile tonal possibilities. Designed with true bypass switching, it preserves your signal integrity when disengaged. Powered by a 9V battery or optional power adapter, the Micro Q-Tron is ideal for musicians seeking high-quality auto-wah effects in a sturdy, road-ready enclosure. Whether you're after subtle filtering or bold, quacky funk tones, this used Micro Q-Tron delivers legendary Electro-Harmonix sound at an excellent value.