Honeywell 944-2GY Frequently Asked Questions

What Is a Security Door Contact?
When attached to a door, a security contact will let the system know when the door has been opened. Both wireless and wired door contacts are available.
Added:

What Do Normally Closed and Normally Open Mean?
"Normal" is the normal state of an opening, such as a door. Normally open/closed refers to the state of a contact connected to a door in its normal position.
Added:

How Do I Install A Recessed, Wired Window Sensor?
Learn how to install a recessed wired window sensor
Added:

Honeywell Glassbreak vs Window Sensors
Glass break detectors and windows sensors are both used to protect against a break-in through a window, but they work in very differnet ways.
Added: