Security alarms are systems designed to detect unauthorized entry or potential threats to a property. They typically consist of sensors placed on doors and windows, which trigger an alert when breached. Many systems also include motion detectors and can be connected to a central monitoring service that notifies authorities if an alarm is activated. These alarms can be wired or wireless and may feature various technologies, such as video surveillance and smart home integration. Users can often control and monitor their alarms remotely through mobile apps, enhancing security and convenience.