I've seen some pretty old postings about wireless mice and Reolink NVRs and so I thought I'd make a fresh comment / question.
I keep my NVR out of sight about 15-20 feet from my monitor/TV screen that is wall mounted. I have a wireless trackball working with the NVR using the provided USB 2.4Gz radio that comes with the trackball. However, the range is about 10' and a PITA to use.

I can switch the trackball to Bluetooth mode which should have a little better range. (Kensington SlimBlade Pro Wireless Trackball, Rechargeable Battery, Bluetooth 2.4GHz Connection Options (K72080WW)) The challenge is to how to add Bluetooth to the NVR. Most receivers require a PC with drivers and need to be configured on the PC and there are dependencies to be connected to a USB on a PC rather than the NVR. I had hoped that after configuring the trackball to work on a PC, I could move the USB receiver to the NVR, but that is not the case.

Anyway, that's my experience. If anyone has any Bluetooth suggestions, I would love to hear them.
Thanks!