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. By listening in on your little one, you'll be alerted each time he or she needs feeding or a diaper change. Video Monitoring The latest models of baby monitors also feature several other options that takes the pressure off monitoring your baby 24/7. The video monitoring capability of some model allows you to watch over your baby anytime and anywhere in your house. 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. 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. Baby monitors that use live video feeds may only be of two things: wired or wireless. Wireless devices are convenient and are the good partners for video baby monitors that use LCD screens as the parents unit. Often times, parents find it difficult to manage their efforts of doing chores while watching the baby. No one can be at two places at the same time, and it has been one of the major dilemmas of parents who still want to be productive around the house but more importantly want to prioritize their child s safety. So to avoid interference, change the frequency of your baby monitor every once in a while and make sure that the frequency you use does not clash with frequencies of other devices. To change frequencies, wireless baby monitors are equipped with a switch that lets parents change frequency easily. 2) Another way to help in solving wireless interference is to find a proper location for the transmitter as well as for the receiver (baby unit and the parents unit).