Summary: They don't make it explicitly clear that one is for Mac and another model for PC. There is no lock to keep from folding while in use. As for what keys do and don't work, I can't say because I purchased a Mac model for my PC because I didn't know any better and because there were no explicit details...
Keys near the hinge "type" if you fold this keyboard while the computer is on
Rhett Redelings, Amazon
17 November 2014
Summary: This keyboard worked exactly once until I folded it and the keys nearest the hinge started reacting as if they were being pressed continually. I bought this for a situation with very little desktop space where data would be entered in at the beginning of a meeting and only sporadically afterward so...
It is NOT Bluetooth despite showing up in search results for Bluetooth.
eDave "eDave", Amazon
26 November 2013
Summary: I am extraordinarily displeased with this product because it was ordered from the results of a search for at BLUETOOTH folding keyboard. IT IS NOT BLUETOOTH. It requires USB to function. There is no reason that this product should ever have appeared alongside other Bluetooth folding keyboards.
Summary: I'm giving this two stars instead of one because technically it was my fault it broke... This would have been a great item but: 1. The keyboard only stays folded in the accompanying sleeve. The latches do not work. 2. When I opened the keyboard for the first time the clips/pins broke. 3.
Summary: This is a reliable working keyboard - that is ENORMOUS!!!! I'm working with a tablet, so the last thing I wanted was something this big, so I returned it. However, I did test it first and it is a really excellent keyboard with great, normal placement of all keys.
Summary: I ORDERED THIS KEYBOARD BECAUSE IT SAYS IT IS BLUETOOTH. MAYBE I'M MISSING SOMETHING, BUT I WOULD HAVE ASSUMED THAT MEANT IT WOULD CONNECT TO MY IPAD VIA BLUE TOOTH. NOT THE CASE. IT'S GOING BACK, AS IPADS HAVE NO USB PORT.