I've bought 3 of these systems, the last one had one camera that would not work at night. I swapped it out, moved it, reset the system and it still wouldn't work at night. I tried to claim the warranty on it but Night Owl just wasted my time with run around. I think their goal is to make you give up in frustration, which I did after over an hour and chatting ( texting), then talking to a very condescending representative. The systems are pretty good for the money as long as you don't have to claim a warranty on it!