Hand-free compact monitor Echos series. 3.5" LCD screen adjustable in horizontal haxis for a better visualisation against light reflex and for the different requirements for user's height. Once the activation button is pressed, the communication without the traditional handset is possible. It is supplied with buttons for door-opening, screen switch-on, bell exclusion (with LED for indication of the present setting), volume adjustment, picture brightness and further 6 buttons for intercommunication service and additional functions. For digital Duo System.