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The 4780 from Cyrex is a Diva handsfree color monitor Simple Bus 2. Color Monitor with 3.5" high resolution LCD. Made of ABS plastic with aluminium facia, fitted with brightness, call volume adjustment, door-opening pushbutton, a voice activation pushbutton provided with LED and 1 pushbutton for the "privacy" function provided with LED. This LED has dual functions one for privacy and the other to indicate the simplex speech mode. There are also 3 free pushbuttons (N.O.) for various services. It can be converted into the desk version by adding art. 4782.