Audio unit for use with Comelit and/or third-party single-unit entrance panels, Simplebus 1 system. To be used in systems with power supply unit art. 1595 and art. 4888C. Easy to configure, thanks to the smart programming of call buttons. Twilight sensor for automatic nameplate backlighting power-off during daytime hours. Omnidirectional digital microphone for high-fidelity audio. Audio-visual indications for disabled individuals, assistance request can be activated via programming. It has 4 inputs for connecting standard buttons or smart buttons art. 3061S. Adjustments and programming are accessible from the back of the module. Dimensions (LxHxD): 110 x 65 x 50 mm.