Audio/video module for Ultra entrance panel, Simplebus 1 system. To be used in systems with power supply 4888CU. Easy to install and configure, thanks to the smart programming of call buttons. Twilight sensor for automatic nameplate backlight switch-off during daytime hours. Omnidirectional digital microphone and dual loudspeaker for high-fidelity audio. Wide-anglecolour video camera (field of vision: 120° horizontal, 90° vertical). Programmable audio/visual functions for users with disabilities.