I order that dongle to be able to use my logitech mouse on my second computer in a smooth way. I received it about 20 days after my order, and I put it on my 1st computer : doesn't work :-( I contacted the seller that told me to "follow the instructions" ... then I saw I had to install a driver to be able to use it (rather strange as this computer have a genuine logitech unifying dongle !?!). After some reading, I found the right driver "Logitech Connection Utility" (and not the "Logitech Unifying Software that was already installed on my computer ?!). After this move, my mouse was paired with the dongle, and immediatly recognised on my 2nd computer (even when I didn't installed the "Logitech Connection Utility" on it !). Well, the dongle meet my requirements, and is very handy to use !