For integration into letterboxes and doorbell systems from various manufacturers, for example in products from Erwin Renz Metallwarenfabrik GmbH & Co KG, Boschstr. 3, 71737 Kirchberg/Murr. The cut-out must be created by the manufacturer. Extends the built-in audio module with video functionality. Video camera with automatic day/night switching and infrared LEDs for illuminating night shots. Built-in heating to keep the lens fog-free. Horizontal/vertical detection angle: 86°/67° Horizontal/vertical adjustment angle: +/-15°, mechanically adjustable Consumption units: 4