The AD-3 gives acoustic-electric guitarists a warmer, richer sound thanks to its tone shaping controls specially tailored for acoustic-electric guitars. It also includes high-quality reverb and chorus, as well as a built-in automatic feedback eliminator. Quite simply, this compact pedal is an acoustic musician's best friend. -Compact acoustic instrument processing pedal developed exclusively for gigging acoustic-electric guitarists -Foot switchable Bi-Stereo Chorus offers split-frequency processing (Low and High) for natural, smooth chorus effect -Studio-quality reverb provides clear, deep reverberation specially tuned for acoustic guitar -Newly developed "Bottom" and "Top" controls offer variable tonal shaping to eliminate "dry" sound from piezo pickups and add rich, resonant lows and brilliant highs as desired -Special Guitar Amp output provides proper impedance and tonal balance for great-sounding connection to a guitar amp -Stereo balanced outputs allow for direct connection to PA -Dual Anti-Feedback function can be manually set to eliminate feedback or can be set to "Auto" mode via footpedal -Batteries included; optional AC adaptor