BOSS AD-8 Acoustic Guitar Processor, feautures COSM modeling technology to transform the piezo pickup sound of an ordinary acoustic into six high-end acoustic guitars. The versatile AD-8 can also simulate the warm sound created by miking the guitar's neck and body -a world's first, floor-based acoustic guitar processor featuring COSM Acoustic Guitar Modeling technology, turns ordinary piezo-equipped acoustic guitars into six of the world's finest acoustics, body and string Enhance controls simulate warm, miked acoustic sounds, High-quality reverb tailored for acoustic guitar, 4-band EQ and Anti-Feedback Onboard chromatic tuner with Mute function and quick pedal-based operation, 4 Preset memory locations for switching acoustic sounds instantly, balanced XLR outputs allow direct connection to PA systems, headphones output 1/4 '' , guitar-input jack 1/4'', runs with 6 batteries AA type (included) or power supply (not included), dimmensions: 250 x 180 x 60 mm, weight: 1.9 kg