Security systems have three basic components: Sensors: Small devices placed around a home or business, which detect signs of trouble. Different sensors "watch out" for different things and trigger an alert if it happens. For example, some trigger if a door is opened, if glass is broken, if there's movement in the room, or if they detect smoke. When triggered, the sensor sends an alert signal to the Control Panel. Control Panel: The nerve center of the alarm system, which manages all sensor activity and sends alerts to the Monitoring Center. You use the Control Panel to arm or disarm the alarm system, as well as to customize your settings. Monitoring: Every alarm system should be monitored 24/7, in order to respond to alerts from the Control Panel. When alerts come in, the monitoring team contacts both you and the proper authorities, to quickly keep your home and family as safe as possible.