Due Fili Plus electronic unit for audio entrance panel, echo suppression, automatic sound balancing, automatic microphone level control, teleloop for hearing aids, 4 call buttons with white LED backlighting and dusk/dawn lighting control, call status indicator LED, 1 input for external camera, 1 input configurable as external button for CA door opener or PA door open, 1 direct opening output for electrical lock, to be completed with audio front cover and single, double or fixed button
