My mistake
I got the receiver in good shape quickly. The price was right. However, and this is my error, I did not make sure that the model was compatible. Shame on Logitech. you'd think a model R800 is an R800 but the real model number is under the batteries and after much digging on Logitech's website, they say that there are two different receivers. Of course I needed the different one. After finding this out I came back here and sure enough the seller points it out. So I guess I have only myself and Logitech to blame. This is my 3rd R800 presenter. Lost one. Bought two but somehow lost the receiver for one.
So, to be fair, I'm giving the seller 5 stars but giving myself one.
Verified purchase: YesCondition: New