The Behringer graphic equalizer doesn't run on batteries; consider it a bonus. (It powers on and works, and although it's for bass, it can also be used with a guitar.) I purchased a spare G3, but now I have three of the same model, so I'm selling one. It should work without any issues, but I haven't checked everything. The effects work properly, and the switches function correctly. No claims, please. Please provide your own adapter. The Zoom G3 features a variety of effects and a looper function. - Model: Zoom G3 - Functions: Tuner, looper, effects - Effect types: Noise Gate, RackComp, Flanger - Control buttons: 3 footswitches - Connectors: Input/output jacks, USB port Thank you for looking. Type... Electric guitar Manufacturer... ZOOM