Thank you for viewing. This is a Märklin AC (alternating current) 100V controller (power pack), output confirmed. This model was imported by Fuji Sho, the former Japanese general agent for Märklin, so it can be used without any problems with the outlets in ordinary Japanese homes. When listing, I have checked with a digital multimeter (DMM) to ensure that the output is within the specified values, and I have test-run several analog locomotives of different types. All plugs and outlets have been cleaned with a second-class alcohol-based solvent for electronic parts cleaning, so there is, of course, no contact failure. All vehicles run forward and backward without any problems, and the reversing switch also works smoothly. <Specifications> ・Red (B) is for vehicles, supplying AC 7-16V operating power (24V output only during reverse operation) ・Yellow (L) supplies 16V current to accessories such as points and signals ・Brown (O) acts as the return path for the current from Red (B) and Yellow (L) There is no dedicated box. Please check the condition of the exterior in the photos. There are some scratches that are difficult to see in the photos, but there are no noticeable large scratches. The output value is also normal, so this is an analog transformer that can still be used actively. If you already have one, how about using it as your sub-controller? Please understand that this item has been in someone else's hands and is being sold as-is, non-returnable, and non-refundable. As this is a valuable item, it will be carefully packed and shipped anonymously via Yu-Yu Mercari or Rakuraku Mercari, with the shipping costs borne by the seller. ※Cannot be used as a controller for mini-club (Z gauge). Märklin HO gauge model railway