Thought maybe you could use this though, once you get one, so you can tell if you have the correct one. I have never seen one with the voltage marked on the label, as that is specifically what the notching is for. It has been my experience that a lot of the folks selling them online are not aware of the two different types, so use all do caution. If you do get the wrong type, it won't damage anything, it just won't work. As Gary mentioned above, the PSR-3000 can take up to a 128 Mb card, but it does not HAVE to be that big. I currently have an 8 Mb in my 3000. I just can't store as much data on it. The only thing I have on mine is the Version 1.8 firmware. I store all of my styles, voices, and songs on USB Flash Drives.