The baby monitors could interfere with each other. For that reason, you need to make sure that they are set in different frequency bands; otherwise, you will only be able to hear irritating electronic screeches. Your most excellent option these days would be to purchase baby monitors that carry features for multi-room monitoring. Aside from that, you will also be able to see your baby even in the worst lighting conditions. Wireless night vision baby monitors can truly be your ultimate partner when it comes to keeping an eye on your baby. It provides the best portability that any video baby monitor can, and it also provides the best functionality because of its night vision capability. Do you believe in the afterlife? These questions seem to have no specific and factual answers and so does the question Are EVPs real? A sound is just a sound and it all depends on how they are interpreted. If the sound of a cat is interpreted as a moo of the cow, then it comes from a cow. If an inaudible noise is interpreted as voices of people from the afterlife then it comes from people in the afterlife. Even the simpler models of these monitors like the audio monitor at least keeps the parents aware if their baby needs them, especially when the child cries. With this technology, parents are given a way to make sure that their baby is safe especially during times when no one is left inside the room to watch the child. You do not have to fidget with wires to be able to set your baby monitoring system up. Just setup the wireless device for the baby anywhere you want in the room without worrying whether the length of the wire is enough to reach the other room where you will setup the receiver. In terms of aesthetics, wireless baby monitors also provide parents an advantage. You and your next-door neighbors may utilize similar channels and wind up hearing noises from each other's homes. Cordless telephones may also interfere with your signal. In case interference is a big issue for you, you can always look for something that utilizes the so-called no-interference technology or has additional security features.