Alesis Guitar FX Effects Pedal The Guitar FX from Alesis is the first 28 bit effects pedal made specifically for guitarists. The Guitar FX has super high quality multi effects as well as cool distortion sounds and amp models. Buy more than one and string them together for even more outrageous effects! Runs on batteries (or on optional AC power supply-not included). Features: 80 User editable programs Built in chromatic tuner Expression pedal input Compact, "stomp box" design 28 bit ultra high quality effects including reverb distortion and various amplifier model included easy to use and program runs on batteries or optional AC power supply can be powered by industry standard pedal boards