While some ghost hunters use sophisticated gadgets and devices to hunt down ghost phenomenon, there are those who use baby monitors. Baby monitors are good for this kind of activities since they are quite sensitive to sounds as well as other factors in the environment. 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. But if you intend to use the video monitor in different places all over the house then it would be a good idea to avail of the wireless devices. Take note though that wireless video monitors also have their limitations. The device for the baby and the device for the parents must be in their proper range with each other or else wireless intermittent connection may occur. One of the most controversial topics about digital technology in baby monitors is health risk. Since these digital devices make use of signals like electro magnetic waves, they may cause health problems to babies especially when they are at that stage when growth and development is on "rapid mode. But another very useful function of baby monitors is during sleeping hours. This best applies to a setup wherein the baby stays in a room separate from the parents. If the parents sleep in a different room from the baby, it would prove to be impossible to be able to monitor him or her perfectly unless you wake up every minute and check up on your little tyke. Another minor disadvantage of this kind of baby monitoring is that you have to confide with the company if you want something to be changed positions, monitoring gadget, monitoring system, etc. Unlike when using your off the shelf baby monitor which you can position to your liking anytime anywhere, you still have to wait for their personnel to come and do it for you. One-way monitors from the name itself, basically only transmit sound through a single channel wherein parents can hear the sounds that their baby makes from the other end. However, the much-improved two-way monitors can allow parents to talk back to their child with their own portable transmitter. Parents who have children with separation anxiety often prefer this type of monitor, as hearing a familiar voice could usually calm the child.