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. The radio transmitter must be positioned 8 to 10 feet away from your baby's crib. Then again, you can always position it closer to the baby for better reception of sounds. The signal picked up by the radio transmitter is then passed on to the portable receiver, which can be carried effortlessly around the house. Video baby monitors make use of cameras instead of just the usual transmitter with microphone device. A camera or a number of cameras are installed in the baby s room and live video feed are transmitted to a TV or LCD receiver. These video devices can either be wired or wireless devices. The most basic application of a wired video baby monitor is to provide live video feed from the room of the baby to the room of the parents. The next option in fixing interference is by properly placing the baby monitor, both the baby s and the parent s units, in the proper location. What does it mean by proper location? It means that the baby monitors should be placed as far away as possible from other wireless devices. This includes cell phones, cordless phones, and routers. Video baby monitors, as the name implies, use video footages for overseeing events in the room where the baby is located. It incorporates the technology used by webcams in computers. Instead of only using the simple transmitter with microphone, a camera is installed with it. The receiver, instead of just having speakers, already has LCD screens installed along with them. Instead, they receive muffled, indefinable, and sometimes almost inaudible sounds which resemble voices and words coming from a human. When examined by experts, these sounds can t be technically explained. But when examined by professional ghost hunters, they turn out to be ghost voices also known as electronic voice phenomenon.