Siedle Basic audio set in bus technology with the functions of calling, speaking and opening the door. Number of integrated call buttons: 4. Each basic set can be expanded to include selected door and indoor stations, as well as switching functions and a telephone connection. Scope of delivery: . Siedle Compact audio door station (brushed stainless steel): 1 . Siedle Basic audio indoor stations: 3 . Set power supply unit: 1
