Audio Integration Unit, black

For the integration into letter boxes and bell systems of different manufacturers, such as the products of Erwin Renz Metallwarenfabrik GmbH & Co KG, Boschstr. 3, 71737 Kirchberg/Murr, Germany. Makes audio communication possible. Built-in relay for operating the door opener. 8 inputs for connecting the doorbell push-switches. Adjustable volume. With interface for the connection of built-in keypad extensions. With interface for the connection of the camera module. Consumer units: 2