Effect pedal, Booster/Overdrive. United with companies widely acclaimed booster circuits and very versatile preamp. Both channels offer shimmering smooth tone with tons of sustain. Each channel delivers two distinct voicing modes that cover the entire range of gain structure. Activate both channel stacks with a single button for unlimited configurations of superb tone. True bypass for eliminating any signal interference when switched off. Can be used with AC adaptor (optional) or 9V Battery.