Although the video option seems like a brilliant idea, you still won't be able to stare at the screen all the time. For that reason, you definitely shouldn t sacrifice an excellent sound quality over supplementary features. Keep in mind that the best baby monitors are not always the most costly ones. But as long as one knows how to set certain prevention methods such as placing the monitor at a safe distance from the baby (at least one meter) and not adding a lot of other appliances inside the baby s room such as televisions or computers, then much harm on the child s health can greatly be prevented. A variety of products not only permits auditory signals to be heard but even allow the mother from the receiver s end to visualize their baby and play music to soothe the baby even from a distance. To this date, they are no longer just an electric device to keep an eye when the baby cries but offers a number of advantages in ascertaining the baby s well-being. Instead, they receive muffled, indefinable, and sometimes almost inaudible sounds which resemble voices and words coming from a human. When examined by experts, these sounds can t be technically explained. But when examined by professional ghost hunters, they turn out to be ghost voices also known as electronic voice phenomenon. 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. In essence, a mobile baby monitor is a radio transmitter coupled with a receiver. The set is synchronized to a predetermined frequency band that gives off a frequency modulation (FM) signal once it is switched on. More often than not, these portable monitors send out signals between the range of 49,830 MHz and 49,890 MHz.