Urmet 1129/501 One family, 4+n wire audio door entry kit with Atlantico (1133/1) door phone and Smyle entry panel
Features:
Second entrance capability with additional relay box 788/51 & entry panel 1129/1
Phone can accept 2 additional volt free push buttons
Full duplex audio
Up to 2 phones in parallel
Adjustable volume with mute function
Maximum distance 300 metres
12V AC power
lock release