I did a little bit of tinkering with it according to the manual but I was so into getting that out into the woods to get it going I probably missed some important info. I read the card compatibility thing somewhere in the manual but I can't find it now. But the bad thing is it has a built in memory thing that won't hold close to the number images as a card would. On top of that if the batteries go dead before you get there to check it you'll lose all images but not if you have a card. So my next thing is to get a card. I would've thought that there was a card supplied with the unit.