Additions Looking for more functionality or coverage from your alarm? There is no need to install a new alarm, simply add new features to your existing alarm!Additional Alarm Sensors (standard, pet friendly or outdoor)Smoke Detectors (hardwired to the alarm, no batteries to worry about)Glass Break Detectors (mainly shops)Hand Remote Controllers (very very convenient)Door or Window SensorsAdditional KeypadsExterior Sirens (replace the old rusted one)Access Control SystemsSmart Phone Control