This is an iRobot Roomba 671. This is a listing for the main unit only, and it is being sold as junk because the operation has not been confirmed. Please purchase this if you can repair it or use it for parts. I have cleaned it to some extent, but there is still some dust, scratches, and dirt that I couldn't remove. Please check the photos and understand this before purchasing. If you have any other questions or requests, please feel free to comment.