I can't get too specific, but do not buy walmarts' power invertors, they suck. My first one was a 60 watt (75mx) and it worked fine for awhile, but then i found out why my PS2 was cutting out, the PS2 take 79 contionous watts per a buddy of mine. I then took the one back and got a 125 continous (300 mx) and it powerered it up without stopping, but it put lines across the screen. I took it back and got the same one again, same thing. I then took that one back, got my money back, and went to Meijer and got a 225 continous (450mx)($39.99) and it works completely fine, it also has a noise filter on it which I could honestly tell the difference. Anyways, the moral to the story is, don't buy your power invertors from Walmart.