Instruction: Given a question and the related document, and generate the answer to the question based on the information provided in the document.

Input:
Question: Are the cameras battery power or 110v ac or both?
Document: This system does just what is advertised. A little sensitive on the motion sensing, even set on low. But that's okay. Other than crawling around in my garage attic to get power to the cameras, they were a breeze to set up. Have had the system a couple of weeks now and it works great. Intention is to get maybe two more cameras to complete the system. There have been some reviews on here saying that it does not time stamp.
Another drawback is that if the power goes out you have to be there to turn it back on. Remote viewing means you are not home so who is going to turn it back on? It needs to reboot itself when power comes back on to be truly useful.
For a temporary system - it works. But, it doesn't work on the Mac, and the online thing that you have to register through before using it with anything except the monitor - predictably, doesn't work. The battery on the screen is terrible. It barely holds a charge, thus rendering it almost useless, unless you have a way to plug it in every 10 minutes.Not the best, but in my house im renting, and for the next 5 months, i'll have to do.
Other than that we are going to buy two more cameras and our system will be complete. Thanks Uniden you made it easy.
Nobody does that anymore because it's insecure. No web browsers, but old versions of IE, do this anymore.It's all besides the point because in order to use a PC browser to watch your cameras and control them, you have to get an OCX plugin from Uniden. But I can't.
Very easy to set-up. Both cameras that were included connected to the display. I purchased a 32 GB SDHC Card for more recording time. Also added a third camera that was also easy using the settings option on the touch screen.
)I just installed the Uniden USD655 for a neighbor and that one is pretty darn nice, pretty darn nice indeed.Uniden UDS655 7-Inch Video Surveillance with 2 Outdoor Cameras and 4GB MicroSD CardYup this one is nice too - sure is.
THE GOOD: The cameras are solid; even just handling them you get a sense that these things are built to last. The image quality is 'good' but not 'great' - if you are expecting to count the pores on the skin of people in view you will be disappointed, but if you mount cameras strategically you should have no problems in getting video good enough to identify hoodlums and vandals.
Pros:  From a technical standpoint I would rate the system 5 stars. It was very easy to install and no issues at all with cameras connecting to the the display unit. WIFI reception of the video is perfect in any area of my two story house. Daylight images are very good and night vision is quite good out to about 40 feet.
Basically you can stream to the internet OR record locally and review later. If you are OK with recording locally and then reviewing the content if there is an issue then these are fine.If you fill up the memory card, recording stops. This is a bummer and I wish it would over write the oldest files.The cameras work very well and the motion sensors are reliable as well.
Answer: AC only (at least mine are)