That is the cheapest Dahua IP camera I've seen of its kind, a 4MP turret type IPC-HDW4431C-A which is the "international" version (hacked firmware for English language) non-upgradeable, you take your chances. Comes stock with a fixed wide-angle lens. I took it apart and replaced the lens with a longer 12mm lens (so I had to break out the glass to fit the case back together). I should probably have just spent another $40 and got the slightly larger 4MP bullet varifocal model which would do the same job more cleanly, but I'm just cheap that way. It does show the value of getting the right lens focal length, if you can assume visitors will walk along the walkway so you can get relatively tight framing.