Zoom A1 Four Acoustic Instrument Multi-Effects PedalExplore New Sounds with the Acoustic Instrument Multi Effect Processor The Zoom A1 Four is a versatile multi effects processor designed specifically for acoustic instruments. With built in looper, drum machine, and specially engineered effects, this processor allows you to create unique soundscapes for your acoustic performances. Specifications: Effects: 80+ Effects Compatibility: Acoustic Guitar, Acoustic Bass, Saxophone, Harmonica Features: Drum