System 106 Door Station Module Matte Black - Compact audio module with an integrated call button for communication between indoors and outdoors. A high-quality microphone and a weatherproof speaker ensure clear communication. Power supply via 2-wire bus. Additional connection for central locking (e.g., necessary from 3 camera modules). All other System 106 modules (except the audio module) are powered through the door station module. Professional labeling available through the Gira labeling service.