To recharge the radio transmitter, simply plug it into the socket as it usually sits still at the side of your baby. Batteries, on the other hand, operate the portable receiver. Although this can be an addition cost, the price you pay in order to take pleasure in its portability is certainly worth it. Remember to steer clear of the router's lowermost or uppermost frequency bands if you're using an analog phone that's set in 2.4GHz. 3. Opt for a wireless phone that utilizes the 900MHz, 1.9GHz or 5.8GHz band. Since these channels are not as commonly utilized as the 2.4GHz frequency band, they're less prone to interference. There have been a lot of reported cases by parents that they are getting signals from the baby units that are not relevant to the baby or the environment. 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. It not only saves you a lot of time and burden, but it also keeps you at ease knowing that your precious one is safe even at a distance. However, with the many different kinds of monitors available in the market at present sometimes it may get confusing. Knowing the different types of monitors and what to consider will surely help you in making a choice. Most people think that baby monitors are only useful at night during the sleeping periods of both the child and the parents. This, however, is not the case. 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. The digital receivers, whether a microphone or s camera, are also more sensitive to sound and visuals respectively. 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.