Basically, a camera set into position with the help of what is known as a video transmitter running to a receiver allows the view from a security camera in a specific place or aimed in a certain direction, such as in a parking lot or door entrance. The security camera whether it is wireless or not, then makes it possible for the surveillance of anyone or anything through sending visual signals through the lenses back to a security monitor which is connected directly to the system.
You want to have a good reception especially if the security camera that is in use, is the type that simply records surveillance. As opposed to a security camera that has a person monitoring at all times. In this case you want good reception as well but it doesn't have to be nearly as clear. Security cameras can be as small as a button on a shirt, while others can be the size of an average camcorder. The size of a security camera varies as well.
Price doesn't necessarily mean better, depending on what the security camera will be used for. If the camera is going to be for personal use then one that isn't that expensive will probably do what you need it for. Security cameras are made to work for the security of people, places, and things of value, as well as keeping places safe and protected. In some cases security cameras are used to give people the peace of mind of feeling safer than they normally would without one.
One of the worst materials a security camera would have to go through would be metal, these types of security cameras are high frequency cameras and are very expensive. Most wireless cameras are limited to four different frequencies while others that must have hidden video lines such as in ceilings or walls can have additional frequencies. The range of reception on security cameras vary.
In some cases security cameras are remotely operated, while others rely on the actual surveillance of a person sitting in front of the security monitor at all times in a separate area. Another form of security camera, simply records the surveillance and it can be viewed at another point and time. Security cameras all have to have power of some kind in order to work however.
Additionally security cameras work on frequencies as well as range. Different concepts are taken into consideration when a security camera is installed. Therefore, there are many security cameras on the market today. Some are better than others, while some security cameras are basic and simple, to those security cameras that are very complex.