There are numerous sensors to protect you and warn you of intruders, fire or carbon monoxide poisoning. On the roof the panels have 2 body sensor with strobe lights. The cameras have movement alarms and send an alert message to a phone. Front and rear body sensors give an audible alarm but do not trigger the main auto-dialling alarm. They have remote controls to stop them sounding at night if you go outside. . On the interior there is a door sensor to detect entry and a PIR movement sensor. There is also an SOS button to call for help if needed. More sensors are easy to add. There are two smoke detectors to warn you of a fire and a carbon monoxide detector to warn of CO2 poisoning