As in wired cameras that plug directly into the board. If it's wireless (like bluetooth) or wires to the PC then it shows up on the list.

I haven't had much luck finding too many wireless cameras

From what I understand it is true that V4 only works with the EZ Robot camera because you attach it directly to the board. The board processes and streams the info to your computer over Wifi then on to ARC. However your still going to be able to use other cameras because EX Builder will be backwards comparable with using computer devices like USB Cameras.

In case you still need to know the size of the V4 camera hare's a pic. Looks like it a little larger then a Canadian Quarter:

Hope this helps.

Ohhhh that may fit! Looks like I need to add to my order