A CAT 5 cable connects the security camera to an internet protocol. The camera has two types – decentralized IP security camera and centralized IP security camera. A decentralized IP security camera has a built in recording function. A centralized IP security camera needs a NVR network video recorder program. The NVR program records images that are stored in a digital storage device. The digital storage device may be a SD memory card or a USB flash drive. A disk drive may also be a digital storage device. Professional grade Security CameraThe professional grade security camera has a detachable lens. The camera allows people to use it for different applications. For example, a standard security camera can cover a distance of 35 40 feet. Distances that are beyond 40 feet can be covered by the professional grade security camera.