The main clock functions as the sound-alarm system and is equipped with a vibrating rod attachment that should be positioned under the parents' mattress. Each time the baby wails, the alarm system triggers the rod to forewarn and awaken the parents. Some baby monitors even come with LCD screens that allow you to literally watch over your baby. One problem of analog baby monitor devices is the fact that there are instances when neighbours can actually tap in to the signal of your baby monitors and listen. With the digital technology, privacy is kept since it broadcasts private signals that only you, the parents, have access to. Another dilemma that has plagued analog baby monitors before is the range. They not only allow them more time to themselves and to work, but most especially, they give them the opportunity to provide for the safety of their children even when they are not right by their side. However, with the many different types available in the market, new parents may find it puzzling to choose which monitor would be the most practical purchase for their budget. Range The size of your house, as well as the distance of the nursery from your bedroom or other vital parts of your home need to be taken into consideration. If you live in a small apartment or if your baby's room is only a couple of rooms away, then virtually any type of baby monitor will suffice. On the other hand, parents who own bigger houses or live in multi-story residences require a device that has a longer range. The major set-back of this variety is the tendency of other receivers picking up the same signal that your monitor transmits, thus less privacy and disturbances are possible. On the other hand, the digital model may cost a little more but it provides more privacy and usually has a wider range of reception than analog. And the sensory monitor is a movement detector that alarms the parent when it cannot perceive any movement from the child for more than 20 seconds. How Does It Play A Role In the Safety of the Child? What baby monitors basically do, is allow the parents to know their child s activities and to watch out for any possible problems from afar, especially if the baby is asleep.