Are baby monitors worth it?

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.

Years ago, a baby monitor was something you used to listen when your baby started crying.

Then, companies started adding cameras.

Now, smart baby monitors are a booming market -- tracking everything from an infant's movement to their heartbeat.

So, are they worth it?