What Do I Need for a Home Alarm System in a Prewired House?

What Do I Need for a Home Alarm System in a Prewired House?. Part of the series: Safety Tips. Just because your home is pre-wired doesn't mean you won't still need a few things to install a home alarm system. Find out what you need for a home alarm system in a pre-wired house with help from a certified firefighter in this free video clip.