The most simple baby monitors make use of a simplex transmitter and receiver system. In the baby s room, a transmitter device with microphone is installed while the parents have a receiver device with a speaker. Any sound the baby makes in the room will be transmitted directly to the device held by the parents. Baby monitors are good for this kind of activities since they are quite sensitive to sounds as well as other factors in the environment. There have been a lot of reported cases by parents that they are getting signals from the baby units that are not relevant to the baby or the environment. Instead, they receive muffled, indefinable, and sometimes almost inaudible sounds which resemble voices and words coming from a human. This is expected of course since you will be given the best possible baby monitoring system they can provide. Of course, if you have the money for it, then this would not be much of a problem. Another minor disadvantage of this kind of baby monitoring is that you have to confide with the company if you want something to be changed positions, monitoring gadget, monitoring system, etc. This can be done through switching your baby monitor on first before any other device. By doing this, you are giving the baby monitor the chance to get the most excellent signal it can. After that you can switch on all other devices but you should always have the cordless phone switched on last. Another way to fix interference issues is by using digital baby monitors instead of analog ones. Considering Your Own Needs Knowing what to look for in a good baby monitor is one thing, but aside from this, it is also important to consider your own needs. Always remember to choose those with features that would fit the type of work that you do in order to make it easier for you to look out for the child. " Interference Since a baby monitor is basically a wireless device, it is highly possible to experience interference with the signal. 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.