Wired baby monitors, as its name implies, makes use of wires to be able to connect the transmitting device and the receiving device. This is a very good system when it comes to baby monitors the only setback is that, the length of wires makes mobility quite impossible. The receiver would more or less just stay in one place. Then again, technological innovations have made it possible to combine sound and visual monitoring. 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. However, the much-improved two-way monitors can allow parents to talk back to their child with their own portable transmitter. Parents who have children with separation anxiety often prefer this type of monitor, as hearing a familiar voice could usually calm the child. What are the major benefits of getting a two-way monitor? You can then carry the portable receiver around during the day or just leave it plugged in at the side of your bed at nighttime. These days, a good number of baby monitors are battery-operated. Some models even have extra capabilities including a video monitoring feature and an option that lets your baby hear your comforting voice. 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. Why do you need to buy one? Mobile baby monitors make it possible for parents to keep tabs on their infants without the necessity of staying awake or standing outside the nursery door all night. 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. The third type of apnea is called mixed apnea. This condition is the combination of obstructive apnea and central apnea.