Flagship Amps and Effects in a Portable Package Powered by their flagship GT-series engine, BOSS's GT-1 guitar multi-effects pedal packs their best amp models and effects into a compact floor unit. A streamlined interface makes choosing and tweaking patches quick and easy. Keep an eye on your parameters with the easy-to-read backlit LCD. Take command of your performance with the GT-1's assignable control switch and expression pedal. Enjoy a clean, noise-free signal, courtesy of 24-bit converters and BOSS's proprietary Adaptive Focus method. The BOSS GT-1 guitar multi-effects pedal fits easily in your gig bag, thanks to its smooth, modern design, and runs for up to seven hours on four AA batteries.This unit is in excellent condition (see photos). Lightly used in a non-smoking home studio. Requires a 9v power source or 4 AA batteries (neither included). For those not familiar, the GT-1 is switched on by plugging a guitar into the input jack.