This is a European Sega Mega Drive Master System converter. 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. *Domestic Master System games are not compatible.* I have played most overseas game titles with it. There are rare titles that don't work, but you can get them to boot by quickly toggling the GAMEJOY's power switch ON→OFF, and then you can play them completely. I wiped it down simply with ethanol, but dust is stuck in the crevices and it's dirty, and there are many scratches. How about it for playing?