I have had this for 3-weeks and I do not like it. I am switching back to my wired keyboard and mouse.
I purchased directly from Logitech.
I do not have the original packaging. I tossed it into trash after I saw this was working and not DOA.
The unifying receiver will be installed inside the mouse.
If you want to test it, bring a laptop and plug it in. I will be happy to dive you my account info for eBay, I have been there since the 90s. Please contact me id you want that info.
Can meet in Albuquerque in a public space on the weekend.
This cost me over $100 and not interested in less money as I can sell on eBay.