The size of your home, and the clarity of frequency are very important factors to consider. 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. It is extremely helpful; especially to parents who cannot possibly stay by their baby s side at all times. The most common type used is the audio monitor. This type receives and transmits sounds produced by the baby to a parent unit so moms or dads could hear the activities of the baby and know if there are any problems while they are at a certain distance. These devices provide an extra ear and extra eye to ensure the safety of the little ones. In the past, baby monitors were simple gadgets making use of a transmitter and receiver system. But now, as modern day technology progresses, so do the baby monitors. As of today, digital baby monitors have risen up to provide parents better quality and functionality when it comes to baby monitors. Unfortunately, such instances could take place quite often if you live in a flat with very close (as in proximity) next-door neighbors. There are actually a number of ways to get rid or avoid interference issues when using baby monitors inside an apartment building. Here are some of them: 1) Change the frequency band. And so, with whatever type of monitor you want to purchase whether audio, video, digital or analog- here are a few qualities that you should always find in a good monitoring device. What to Look For in a Baby Monitor Clarity of the Reception (whether audio or video) and less static is always a good quality for the baby monitor to become effective in child safety. What is a Mobile Baby Monitor? 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.