This is a mini-amp that came with a beginner's guitar set. It's battery-powered, so it can be used portably. I bought another amp at the same time, so I haven't used this one at all. It will be handed over without confirmed operation. As a bonus, I'll include a 3m shielded cable. This is also unused, so it will be provided as is. Weight: Approximately 400g Size: 135mm x 140.8mm x 75.2mm Power: 9V battery (alkaline batteries recommended) *Cable sold separately Battery life: Approximately 1 hour (using alkaline batteries) Output: 3W Maximum current consumption: 1A Terminals: Input, Headphone (Mini), AC adapter jack Controls: Volume, Tone, Drive ON-OFF switch