STR HT 40 2-wire bus audio telephone for the STR QwikBUS system. Microprocessor-controlled QwikBUS house telephone with optimized voice control, 8 selectable ring tones for the door call (floor call cannot be changed), ring volume continuously adjustable, with optical display when the call is muted, call differentiation between ring tones of the door station and between door call and floor call. One button each for door opener, function and additional. Audio privacy lock, dimensions: W 84 x H 180 x D 20 mm Installation: surface-mounted
