I do not know what demands have other parents, but enough for me that the machine tells you if there are noises near my baby. Whether caused by him or not. I then look after anyway and do not want to hear out if my baby cries, cries, babbles etc. or whatever was the cause of the noise. Certainly is heard in the transmission noise. But as I said, I will make sure me anyway again even if everything is fine. And the price is unbeatable nunmal. Property me six years ago by an expensive baby monitors (90) provided that no longer had to offer. So if you want to spend his money for other nice things for his baby, can save here with a clear conscience!