Thank you for viewing. This is a Roland battery-powered stereo amplifier, the MOBILCUBE. I acquired it used, but I haven't used it at all since I got it, so I'm selling it. I haven't confirmed its operation, so it's being sold as-is, no returns or claims accepted (NCNR), and the price is set low. The original box and instruction manual (with some highlighting and writing by the previous owner, see photos) are included. An uncompleted warranty card is also included, but it's useless as the purchase date and date are not filled in. It runs on six AA batteries, which are not included. The AC adapter (PSB-100) was originally sold separately and is not included either.