These are PTZ cameras and so have a large amount of flexibility for size of room. They use an optical lens, rather than digital zoom, which keeps the image at the highest quality without sacrificing distance. Listing includes an official Polycom remote control

Simple to install, just use a USB to connect to the necessary device.

Requires a 12V Power Supply

PLUS Privacy and Lens Cap Cover for FREE

I had been using these camera's in my own conference room but have reduced the size and therefore needed a different solution. Main thing I can pass on is ensure that the camera is mounted on a rigid mount because the zoom can otherwise be shaky. 

No warranties, nor guarantees can be provided.