In the world of the ghost hunters, EVPs are voice recordings that are sent by ghosts or souls that have not moved on. These are sometimes used to prove that there really is life after death. While some ghost hunters use sophisticated gadgets and devices to hunt down ghost phenomenon, there are those who use baby monitors. Baby Monitors Basically, baby monitors are devices that parents can use to be able to observe their baby even if they are not in the same room. The most simple baby monitors make use of a simplex transmitter and receiver system. In the baby s room, a transmitter device with microphone is installed while the parents have a receiver device with a speaker. Advantages of Digital Baby Monitors Digital baby monitors make use of modern digital technology thus giving them a little bit of an edge against other analog baby monitors. When it comes to audio and video baby monitors, quality offered by digital technology is superb. Another advantage that digital technology has is that it provides clearer reception. Because of this trend, as well as the necessity for better portability, a good number of modern baby monitors are currently equipped with ultra-small receivers. Most baby monitors these days also come with receivers that have belt clips. This feature allows parents to carry the device around without much effort. You may have seen it in the movies or on TV - the navy seals attacking at night are not at a disadvantageous position since they are using their handy dandy night vision goggles. That same technology is being used in today s baby monitors. Even if the lights in the baby s room are switched off, with the help of the night vision baby monitors, you can easily see your baby. Since it is wireless, the limitation that the length of wires provide does not apply to it making it more possible to move around the house while still being able to monitor your baby. Almost all types of monitors, whether audio or video, can be wired or wireless. It all comes down to budget and preference.