Of course, you also need to factor in the cost of buying a baby monitor. The high-end versions can cost as much as $300 dollars or more. These mobile baby monitors normally feature a video monitoring option that allows parents to keep a closer eye on their babies. Then again, if you prefer the cheaper variety to the pricey ones, be prepared to shell out around $40 to $90 for the radio models. The other type of baby monitor is the audio baby monitor. This is the descendant of the basic uni-directional system used by basic and usually old monitors. These new types of baby monitors however have been integrated with new technology. Instead of just being able to hear your baby, you can now actually talk back to him or her. Video monitorsallow you to see and hear your child by combining sound and video just like miniature TV sets. They use a small camera either mounted on the wall, table or crib to transmit the images into the LCD display. They are usually portable and come with multiple cameras and even night vision. Sensory monitorsdetect the baby s slightest movements even during sleep. But what if baby monitor transmitters pick up more than what they are supposed to? It has been the topic of discussions that baby monitors, especially audio types, pick up more than just sounds coming from the baby. Some parents tell stories of their baby monitors picking up EVPs. What are EVPs EVP is short for the term Electronic Voice Phenomenon. Baby video monitors, instead of just using audio, now make use of visuals. Parents can now opt to choose whether they want a camera installed so that they may be able to monitor their baby visually. The camera sends feeds to its partner video monitor used by the parents. Wired or Wireless Baby video monitors can either be wired or wireless. If channel adjustments still won't work and the substitution of the appliance is not an immediate alternative, make an effort to keep the conflicting devices at a safe distance from one another. Doing so will somehow reduce the likelihood of interference. Other Safety Tips - Don't ever use a mere baby monitor to justify your absence.