The indoor siren is installed inside your building. It is the last and most important component of a complete alarm chain. The indoor siren is an acoustic signal generator. Here you can choose between two alarm modes. Due to the high sound pressure (90 dB) and the signal frequency, both signals are perceived as extremely loud. You can use the remotely activated LED on the alarm siren to identify the status of the alarm control panel (activated/deactivated). The robust plastic housing of the acoustic signal generator is protected against sabotage by a wall and a cover contact. The indoor siren is supplied with an external 12V operating voltage.