Do the wireless usb receiver mouse and keyboards use bluetooth connectivity or some other way? I have a 2007 apple A1224 i dont think they had bluetooth back then. Will the wireless usb receiver mouse and keyboards plug n play with this computer? On the bottom of devices what does the connect button mean? usually it means connect bluetooth pairing device but i dont think this 2007 apple has that. Also are the devices programmed to the one receiver differently so they wont criss cross if used in the same distance? Interchangeable from plug in receiver on one cpu to the other and no other changes made?