To be opened upon receipt in case ...

Do not make like me by not testing immediately grader and above the package.
I did not have issues with a Bluetooth mouse but alas, it does not. I took the time to try it on several machines and with different Bluetooth versions. We must face the facts it is HS and frankly I've never seen that in thirty years of business. So my opinion is "GO AWAY" unreliable equipment is the least I can say.
Now, having thrown the package is a mistake on my part, so I assume I'm going to buy another one and it went in his place ie "BIN".