AHD Cameras come with innovative AHD chipset, it has much higher resolution than analogue system which is very close to IP system. Easy to setup like the traditional Analog system. No complicated setup required. Plug the cameras on the back of the recording unit and CCTV Footage will show up on your monitor. However it will only compatibility with AHD units so please make sure AHD cameras are used with AHD Recorder Unit. It costs slightly more than analogue system but it worth it. This collection also comes with 1 Channel audio recording as a extra benefit.