How to Tell if Your Home is Pre-wired for Security   Many times a new homeowner is unaware that their home is pre-wired for security.  In the video below, you will discover how to spot the alarm pre-wire.  

As a reminder, what you are looking for in the bottom of your window frame is a small button looking contact, that is a little bit bigger than the end of your pinky.  Sometimes, you may not see the contact, but will see a glob of silicone instead.  If you see the silicone, you can be quite sure that the contact is below.

Hopefully this will help you determine if your home is pre-wired for security.  If you are pre-wired, you should definitely install a hardwired system.  A wireless unit will not make use of the existing contact points.