Being able to talk back through the portable transmitter can be very beneficial for parents who have kids with separation anxiety. A familiar voice from the transmitter could be enough to calm a child s anxiety tantrums or pacify worries. And thus, parents who often find themselves caught up in the middle of work, can now simply talk to the child and calm him down without physically being next to him. This is usually caused by defect in the part of the brain the controls breathing. In babies, this could be a congenital defect. Central apnea is very rare in adults but quite common in babies especially those who were born prematurely. Unlike obstructive apnea, this can happen at any time of the day. Audio baby monitors only make use of sounds while video baby monitors make use of a camera and transmitter to send video feeds to a LCD receiver. LCD or Liquid Crystal Display are the choice of manufacturers in video baby monitors since it is light, and is the best mobility wise compared to CRT devices. This becomes very useful in instances wherein you might be preoccupied with loud noises in the area such as the sound of the television or vacuum. This will at least keep you alert and aware if the baby is making noises. Having an indicator on the gadget that activates whenever the battery is low prevents instances of the battery running out without you knowing. Baby video monitors, instead of just using audio, now make use of visuals. Parents can now opt to choose whether they want a camera installed so that they may be able to monitor their baby visually. The camera sends feeds to its partner video monitor used by the parents. Wired or Wireless Baby video monitors can either be wired or wireless. Simpler monitor models will do for smaller houses, but you may need a more sophisticated monitor system for a larger house. The lifestyle and the type of work that you have to do around is also another important factor to consider, especially if your work requires you to be farther away from your baby s room and you may need a monitor that covers the range, particularly a portable one.