Zoom A1X FOUR Multi-Effects PedalWith specially engineered effects, built in looper and drum machine, the A1 A1X FOUR is the first Multi Effects Processor designed for a variety of acoustic string and wind instruments. A1 FOUR offers over 80 built in effects A1X FOUR offers over 90 built in effects Dedicated effects for acoustic guitar, saxophone, trumpet, violin, and harmonica Up to 5 effects can be used simultaneously, chained together in any order 50 memory locations for storing