This is a genuine AC adapter that can be used with DUO-RX and DUO-R. Operation has been confirmed using an actual DUO-RX unit. There are damages such as scratches and dirt. Please check the condition by viewing the photos. *If it is difficult to confirm with the photos posted, please comment before purchasing. We will respond by adding more photos. Immediate purchase without comment is OK. Thank you. * *We also have PC Engine software for sale. If you purchase multiple items, we can offer a discount (about the amount of shipping costs that can be saved by combined shipping). We cannot offer a discount for single purchases.* * Also, if you wish to have combined shipping, please consult with us before purchasing. We cannot accommodate combined shipping after the product has been purchased. *We plan to ship via Yu-Packet Plus. Due to the size of the shipment, we may not be able to accommodate combined shipping. *Yu-Packet Plus does not allow for specifying the delivery date and time. *Operation has been confirmed, but due to the age of the product, we cannot guarantee its operation after purchase. We also cannot accept returns, refunds, or cancellations. Please purchase only if you can agree to this.