Indoor intercom with 7 displays for Busch-Welcome IP door communication. Full duplex communication. Features a new installation assistant specifically designed for single-family home applications and includes an integrated app interface. Hands-free function with adjustable volume. Integrated hearing loop for hearing-impaired individuals. Suitable for surface-mounted or flush-mounted installation (box not included). For flush mounting with 42491F and for surface mounting with 42491S-x. During a call, an image of the visitor can be captured and stored in the image memory. Three images of the visitor are automatically saved in the image memory if door calls occur in the absence of the visitor. Power supply via PoE standard according to 802.3af (Class 3). Adapter and connection cable for CAT cable are included. Note: Panel for pure door communication, no connection to building automation possible.