Thank you for viewing this item. This is a KATO power unit. I am selling it because I found it after having it stored away for several years. I used it for a total of 1-2 days after purchase, and I think there is almost no wear and tear. How about using it as a power unit for B-Train or Chibi-Den? Please feel free to comment if you have any questions or requests for additional photos. Manufacturer...KATO Power unit for small vehicles Limited Express Train 1