Baby monitors are responsible for transmitting sounds (and even video) from one place to another. This way, you can engage into all kinds of activities while keeping an eye (or an ear) on your baby. You can welcome some friends, clean a different room, water the garden or perhaps cook. When you baby wakes up, their sounds notify you right away. According to Baby Wha Wha, baby monitors are made of two different parts – the transmitted and the receiver. The units transmitting video images are larger in size. All in all, do your homework and research products before buying one.