Holy cow, I wrote a book!
I bought myself a wireless mouse and was setting it up.
Step 1: Insert the batteries. Check.
Step 2: Position the receiver.
Make sure the distance between the mouse and receiver is within the
wireless range specified on the packaging.
I wanted to put the receiver on the floor, off of my desk,
so I had to make sure it would still be in range of the mouse
on my desk.
Let's look at the packaging.
Nope, no mention of the receiver range.
I guess this proves that nobody reads the installation instructions.