Audio-Video speaker unit for 2-wire system SB2 with terminal block, 14'' CCD color video camera, and LED lighting for the video camera. An integrated feature is the handicap function according to DIN 18040 with status indicators for door call, readiness for conversation, door opener function, and participant availability visually indicated with LEDs behind standardized handicap symbols, as well as acoustic voice output of the statuses. Speaking connection with echo cancellation, dust- and waterproof 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.