Have you ever own a baby monitor before? On the other hand, have you been through a couple of baby monitor reviews as you search for the best model? But do you know what is a baby monitor exactly. They are an advance adaptation of a simple transmitter and receiver system. Just like a conventional walkie talkie. It picks up sound using an appointed channel and transmits it via wireless signal. When it first came out, baby monitors are only one-way transmission. The sounds from baby’s room were pick up and transmitted to the parent’s receiver device. Nowadays, with the ever-changing development in technology, baby monitors undergo many improvements. One of these improvements is the inclusion of video monitor. Baby monitor that comes with audio instead of just using audio are extremely convenience for parents. Now, parents can now select to choose whether to install a camera or not. With the camera, they can visually monitor their baby instead of just depending on audio transmission.