AC Adapter for Game Boy, DMG-03 Model - Type: AC Adapter - Model: DMG-03 - Voltage: AC100V 50/60Hz 4VA - Output: DC 4.8V 150mA - Country of Manufacture: Japan No instruction manual or outer box included. It will be shipped in the remaining styrofoam case. The shipping styrofoam has age-related stains. Also, some white material, possibly from the styrofoam, is stuck to a part of the cord (see photo). I have confirmed that it at least powers on and can start the Game Boy, but I do not guarantee its functionality upon arrival. I have also not checked the charging performance. Since this is a very old item, please use it with caution. I am not responsible for any issues arising from its use. Please understand that this is a used item from over 30 years ago before purchasing. Other Game Boy software I have for sale is here ↓ #DanboGB