Wireless camera surveillance systems just got a lot easier to set-up and use. Imagine a video camera that can transmit live colour video more than 100 feet away. Some wireless camera systems are integrated advanced digital technology as well as 2.4-GHz transmitters into a single device that fits in the palm of your hand. Wireless cameras and a DVR (digital video recorder) can allow you to add multiple cameras and scan between the cameras like changing channels on your TV.