The most common type used is the audio monitor. This type receives and transmits sounds produced by the baby to a parent unit so moms or dads could hear the activities of the baby and know if there are any problems while they are at a certain distance. Lately, additional features have been placed to these audio monitors, wherein parents could now talk back to their baby. Factors To Consider When Buying A Baby Monitor Low-battery Indicator As much as possible, you should purchase a baby monitor that has a low-battery indicator. In this way, you will be alerted whenever your batteries need replacement. Compactness The smaller the size of the baby monitor, the more effortlessly you can carry it around. 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. If you want to ensure that your next-door neighbors won't be able to pick up the transmitted sounds from your baby monitor, purchase a digital version instead of an analog one. By doing so, you'll be assured that the only sounds you will perceive are the ones that are coming from your little one's room. If it would be used in a bigger house, then a wider range is required. A smaller house or apartment might not need as much range especially if one lives in an area where there may be a lot of interference such as cell phones and other monitors that could disrupt the signals. But it is also important to consider the user s activity, especially if work might require him or her to be of farther distance from the child. You can actually use baby monitors even during the day when you have other things to do around the house like cooking or other household preparations. Wireless VS Wired Baby Monitors Video and audio baby monitors can either be wired or wireless. Both modes have their own advantages and disadvantages.