Audio-Video speaker unit for system SB with terminal block, 14'' CCD color video camera, and LED lighting for the camera. An integrated feature is the handicap function according to DIN 18040 with status indicators for door call, ready for conversation, door opener function, and participant availability, visually indicated by LEDs behind standardized handicap symbols and acoustic voice output of the statuses. Speech connection with echo suppression, dust and water-resistant speaker, electret microphone, and adjustable speaker volume on the front side. Microprocessor and DIP switch unit for addressing participant addresses. Integrated electronic door opener function 3A and additional relay contacts C, NC, NO with 10A. 33V DC power supply via the corresponding power supply unit. Designed for installation in modules. Dimensions: 102 x 55 x 38 mm. 4680C.