Software only. Operation has been confirmed on a Game Boy Color, but there is a possibility that it may not start or operate properly depending on the customer's game environment. Also, we cannot guarantee the remaining battery life. We cannot accept returns in such cases, so please be aware of this beforehand. There are small scratches and discoloration. Please check the photos. Please forgive any oversights. This is a long-term storage item. Thank you very much. ✴︎