The MXR GT-OD Overdrive pedal creates smooth, warm, and classic overdrive without excess noise or tone coloring. The simple controls make it easy to dial in a great tone quickly, from crunchy rhythm tone with chord clarity to sparkly and harmonic-rich lead tones with tons of sustain. You won’t find an overdrive that is more organic, responsive or open sounding. Power: Dunlop ECB-03E AC sdapter or single 9 volt battery.