Fermax 1 Way VDS One- To- One Audio Kit 

Complete audio door entry kit, allowing communication between the house and the outdoor panel. Kits include: outdoor pushbutton panel, box, monitors for apartments and DIN power supply for installation.
This panel includes an OneToOne information screen that informs on door entry operation using illuminated pictograms: calling, in call, door open or channel busy. Facilitates use for people with hearing difficulties.

TECHNICAL SPECIFICATIONS

Includes: 
7356. 1/W VDS ONETOONE CITY Panel. S4: 130x199.
8854. Flush box S4: 115x185x45. 
3440. VDS LOFT EXTRA telephone with induction loop.
2438. Light/buzzer activator.
4810. Power supply 18Vdc/1,5A-12Vac/1,5A. DIN 10.