I have kept this at home for a long time and haven't used it. It works. * No detailed operation or maintenance performed. Includes the main unit, the main unit box, the adapter and its box, and the instruction manual. As shown in the photos, the box is deteriorated, and the main unit and adapter have stains. The logo on the main unit has come off. * See photos. Thank you for your understanding. Feel free to comment! ^_^