I have a Swann 8 camera hd system, full infrared vision, 2 tb hard drive that records 24/7 for thirty days before it will begin to writeover. I installed it myself and I love it. I record 24/7 for thirty days before it begins to over write. Night vision is pretty good for about 65 to 75 ft.. The system is hard wired but is not that much of a challenge. The unit goes for 599.00 at Sam's but they regularly have 100.00 instant savings on it. I've cut video to give to police and they say it's great.