Hello,

Thank you for your interest in the S2340M monitor! This monitor pulls about 17 Watts under normal usage and 0.4 Watts in powersave mode. Here is a detailed guide to the environmental and power statistics for this monitor:

http://www.dell.com/downloads/global/corporate/environ/comply/disp_s2340mc.pdf

Hope this helps!
JonathanNforDell

Hello,

Thank you for your question! I did some research into this and it seems like there are sometimes issues with MiniDisplayPort to DVI adapters from Apple and 3rd party monitors like this Dell. It seems that using a non-Apple adapter or using an Apple MiniDisplayPort to VGA will work just fine. The HDMI to DVI monitor is likely having issues because of the first monitor having issues, and it would clear up if the first monitor's adapter is changed. Check out this Apple Support website:

https://discussions.apple.com/thread/2792046?start=15&tstart=0

Hope this helps!
JonathanNforDell

Hello,

Thank you for your interest in the Dell S2340m LED monitor! I do believe that this monitor can work with a CCTV system. It will accept and display any signal you send to it via its VGA or DVI inputs. Most CCTV systems have cameras that hook into a control box. From this box, it usually sends a signal to the monitor via a VGA cable and you can control what you see on the screen from the box. Be sure to check with your CCTV system for any final questions about LCD monitor compatibility.

Hope this helps!
JonathanNforDell

P.S. - The monitor itself does not contain any cameras within its frame.

Hello,

Thank you for your interest in the Dell LED monitor. Yes, this will work just fine under Windows 8.

Hope this helps!
JonathanNforDell