I have a box of the little thumbnail sized dongles (well, just six) and I'm trying to find out which belong to two wireless keyboards I'd like to give away, but I'm having no luck getting the keyboards to work with any of them. I know a couple might be for mice, fitbits and I'm sure at least one of these was for one of the keyboards. The friend I'm trying to give the keyboards to is not a techie and won't be able to figure out how to use them without their original USB dongles.
Is there a smarter way to look at the dongles with an app or something to see what they were originally for?