Rechargeable battery pack DMG-03 for Game Boy. - Model: DMG-03 - Type: Rechargeable Adapter - Compatible models: Game Boy only - Package contents: Main unit, instruction manual, charging cable Thank you for viewing. I have not been able to confirm the operation as I do not have a Game Boy console. The adapter has some discoloration. The box is in relatively good condition. Please ask if you have any questions.