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. A number of products on the market also offer other means of alerting deaf parents to the cries of their infants. One particular product consists of receivers that come in two parts: a main clock and a tiny sound sensor. 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. It is more important when you live in a flat where there are a lot of people and strangers can easily come and go. 2) Just like with any electronic device, do not let your baby monitor, either the transmitter or receiver, get in contact with water. These devices have enough electricity in them to cause shock. 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. 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. A light alarm that activates whenever it picks up sound is always a good feature of the gadget. This becomes very useful in instances wherein you might be preoccupied with loud noises in the area such as the sound of the television or vacuum. This will at least keep you alert and aware if the baby is making noises. Wireless Baby Monitors Baby monitors can be wireless or wired. 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.