I have confirmed that it powers on with a genuine AC adapter. I haven't connected it to an amplifier or guitar, so I don't know if it works properly. The plastic parts of foot switches 1-3 are broken. Switching is still possible, so it seems to function. Due to the above condition, please purchase only if you understand that it is non-refundable and non-returnable. Multi-function effects unit, equipped with four foot switches and multiple control knobs. Features VAMS, a hybrid of analog and digital technology. Includes 69 types of effects, covering famous guitar amplifiers, classic instruments, and the latest effects. You can freely combine up to 9 effects. Also, modulation effects and delay/reverb effects can save up to 2 custom settings. Effect Programs: 69 types (67 effects + amp simulator + ZNR) Effect Modules: 4 modules + amp simulator + ZNR ■ Brand: ZOOM ■ Model Name: GFX-8 ■ Output Terminals: L/Mono, Phones ■ Power: 12VAC 500mA (not included.) ■ Foot Switches: 4 foot switches ■ Control Knobs: Multiple control knobs