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. These questions seem to have no specific and factual answers and so does the question Are EVPs real? A sound is just a sound and it all depends on how they are interpreted. If the sound of a cat is interpreted as a moo of the cow, then it comes from a cow. If an inaudible noise is interpreted as voices of people from the afterlife then it comes from people in the afterlife. Heart Beat Monitor This feature is a must for the device that you will choose since no apnea monitor is 100 percent accurate in detecting cessation of breathing. This will serve as a backup in case the apnea monitor fails to detect apnea because it will also manifest in the heart rate of the baby. Another must have feature is a remote alarm. Because of this trend, as well as the necessity for better portability, a good number of modern baby monitors are currently equipped with ultra-small receivers. Most baby monitors these days also come with receivers that have belt clips. This feature allows parents to carry the device around without much effort. 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. You can transfer from room to room or while even in the bathroom and still you won t lose track of what is happening to your baby. Another advantage of these wireless devices is the ease of setting it up. You do not have to fidget with wires to be able to set your baby monitoring system up. Just setup the wireless device for the baby anywhere you want in the room without worrying whether the length of the wire is enough to reach the other room where you will setup the receiver.