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. However, these gadgets may sometimes cause annoyances rather than comfort and relief especially when you live in close proximity with your neighbours such as in flats. Wireless baby monitors are usually the gadgets that experience this kind of problem. They experience interferences because of different factors one of which is the use of other wireless devices either in your flat or in the flat of other tenants. On the other hand, parents who own bigger houses or live in multi-story residences require a device that has a longer range. In this way, they will know for certain that the transmitter and receiver will not falter even in extended distances. Portability Every now and then, people may share a similar opinion when it comes to size. 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. Also, the family budget in choosing a monitor must also come in mind. If you are decided on getting the best and if you have the means to splurge on high-end monitors, then there is absolutely nothing wrong with that. Another advantage is that the digital models do not have as much static and they give a clearer sound quality so you can hear your baby better. Video monitorsallow you to see and hear your child by combining sound and video just like miniature TV sets. They use a small camera either mounted on the wall, table or crib to transmit the images into the LCD display. The receiver, instead of just having speakers, already has LCD screens installed along with them. Video baby monitors have also taken advantage of the current technology of the Internet. With the video baby monitor installed in the room, parents can access the cameras and view the conditions of their babies even when they are at the office.