Thank you for viewing. This is a TOMIX 5016 Transistor Controller DU-2. Please check the condition in the photos. Since I don't have an environment to test its operation, I'm selling it as junk. Returns are not accepted even if it doesn't work. My father, who loved trains, owned this, so I cannot provide detailed information. This item has been stored at home for a long time, so please understand and accept this before considering a purchase.