This is a Sega Mega Drive Master System converter for the European market. I used it in combination with the Mega Drive compatible console GAMEJOY. It allows you to play Master System games from North America and Europe. *Japanese Master System games are not compatible.* I have played most overseas game titles with it. Occasionally, some titles won't work, but you can get them to start by quickly turning the GAMEJOY's power switch ON and OFF. They will then work perfectly. I have cleaned it simply with ethanol, but dust is stuck in the crevices and it's dirty, and there are many scratches. Would you like it for playing games?