Zoom GFX-3 Guitar Effects Processor Features: 50 built-in Effects / 60 preset Patches 10 Amp and 10 Distortion Types 8 Simultaneous Effects 60 Available User Memory Presets Large Foot Switches and Metal Chassis Built-in Auto-chromatic Tuner Built-in Expression PedalTechnical Description Power: 4 x AA batteries or optional AC adapter (AD-0006). Your review of the GFX3 Guitar Effects Pedal Zero usefullness! Could hardly be any worst should be discontinued Could have spend my money on better Better guitar out there GFX3 Guitar Effects Pedal is just average It's Good top 10 guitar top 5 product Nothing better out there