Roland Mobile Cube This is a battery-powered amplifier. It has a microphone input and an instrument input, and can be used for street performances, mini-live concerts, and lectures in small rooms. I have confirmed that sound comes out when connecting a guitar, microphone, and MP3 player. I have tested it with batteries. *AC adapter is not included, so it is unconfirmed. There is some wear and tear, and there is a scratch on the front edge, but it has been stored indoors, so I don't think it's too damaged. Accessories None *Body only