Another type of apnea is central apnea. This is usually caused by defect in the part of the brain the controls breathing. In babies, this could be a congenital defect. Central apnea is very rare in adults but quite common in babies especially those who were born prematurely. Unlike obstructive apnea, this can happen at any time of the day. Many of the hi-tech monitors nowadays, especially the video or even movement sensitive monitors instantly alert the parents when there are problems detected. Sensory monitors even send alarms whenever it cannot detect movement from the baby for 20 seconds or more. Even the simpler models of these monitors like the audio monitor at least keeps the parents aware if their baby needs them, especially when the child cries. They work through the radio frequency and use FM signals to transmit the sound. 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. Since these channels are not as commonly utilized as the 2.4GHz frequency band, they're less prone to interference. If you have a preference for multiple-handset-capable wireless phones with a handset-conferencing option, pick one that makes use of only the 1.9GHz or 5.8GHz channel. 4. Switch on the baby monitor first. The device usually functions by means of transmitting sound from the baby's room to a portable receiver that can be conveniently placed inside a pocket or strapped around the waist. People with excellent hearing can rest assured that their infants' cries will be heard, even if they're in another part of the house. Children, after all, are much more prone to damage as their systems are still developing at such a young age. So we ask the question that many of these parents want to know, is it really safe to use digital baby monitors for children? What is Electro-SMOG and How Does It Threaten Our Health? Electro-SMOG is the electromagnetic energy that is emitted by common gadgets in our home such as our televisions, cordless phones, microwaves and digital baby monitors.