This listing is for the main unit and AC adapter only. It's a wireless type that can be played without connecting the AC adapter if it's charged. It can produce clear sound, and I liked it, but I'm selling it because I want other equipment. ◯ Product Contents There are no instructions or outer box. Only what is shown in the photos is for sale. There are a few small scratches, and a slight rust on the base of the handle. It's clean for a used item, but please refrain from purchasing if you are concerned. I tested the sound, and there were no particular problems with the sound. It also worked fine on batteries. Bluetooth also worked. I haven't connected it to a computer, so the audio interface function is unconfirmed. Thank you for your consideration.