Signal to noise ratio refers to the signal that delivers a clean video surveillance feed. Most security cameras will want to have a very high ratio so that video is not grainy and unclear. The security cameras that we use have CCD chipsets, which allows for signal to noise ratios up to 58db. This produces amazing video quality in the day and especially in very low-light situations or even total darkness. We listed some of our high and top-performing security cameras with high signal to noise ratio.