Yes, you need a virtual terminal and a wireless access card. If you want software for cash sales as well... try POS software search in Google http://pages.prodigy.net/daleharris/pos.htm
I should note, the pic was to demonstrate what they look like. I was trying to type out a diagram, but it looked fierce. The ones that we made only used 12 jars, and looked really cute in every window.
I'd call them also. I think they have issues with their email server. I signed up for their newsletter forever ago, and every time they send one, it freezes my Outlook. So now I just delete it.
We used to use baby food jars to make Christmas trees. You just drill a hole in the lids, and use a strand of 25-50 lights (putting 2-4 lights in each jar). Hot glue all the jars together: Then wrap ribbon around the outside to decorate.