Wired baby monitors make use of wire for the device on the baby and your device to be able to communicate with each other. While this setup is very effective, it will not let you move that freely. You will only be able to move as fire as the wire goes. The other kind of baby monitor takes away this disadvantage of distance. What to Look for In Baby Sleep Apnea Monitors There are a lot of different baby sleep apnea monitors each with different features. In choosing a baby sleep apnea monitor, there are certain features that the device must have to ensure the proper monitoring of your baby. 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. By simply positioning one radio transmitter in each room, you can listen to the sounds coming from your baby's room even if you're busy with house chores or other stuff. Then again, this added capability comes with a number of drawbacks. The baby monitors could interfere with each other. For that reason, you need to make sure that they are set in different frequency bands; otherwise, you will only be able to hear irritating electronic screeches. Parents who are hard of hearing or deaf also share the same opinion about baby monitors. Even though they put up with a lot of difficulties in caring for their babies, the ounce of reassurance they get from using such devices is more than welcome. Special Features Hearing-impaired individuals are definitely faced with two times the challenge of caring for a baby. In selecting a monitor that best fits your family, you have three major options to choose from an audio, video or a sensory monitor. Audio monitors allow you to hear the activities of your child (ex: crying) as they pick up sound. This type comes in both analog as well as digital models. The analog monitors are the most affordable but are usually still reliable. 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.