Audio module, CD series, alpine white for the CD series Product features Can also be used as a secondary signal device (bell) Calling and floor call Reverse polarity protected 2-wire installation (JY(St)Y 2 x 2 x 0.8) Parallel connection (simultaneous calling) of max. 4 audio modules or audio indoor stations (from the 3rd device onwards, the Siedle BPS is required for programming) High-quality sound and great speaker dynamics Electret condenser microphone Connection for Siedle In-Home bus Connections for floor call buttons and other modules Call generator with 11 ringtone melodies, including gong Ringtone volume adjustable in 5 levels up to 92 dB(A) Speech volume adjustable in 5 levels Programming Manual, Plug+Play and via Siedle bus programming software (BPS), according to Siedle system manual Automatic call acceptance for internal calls