White ABS mono videophone in the 3000 Series design. Includes 5 buttons, call tone, brightness and contrast controls and 2 LED’s (On & door open indication). Up to 4 video handsets per call button with intercommunication between the handsets. Other facilities include adjustable call tone and time, camera recall (selectable), timed mute facility with led indication. Each monitor requires a 3980J mounting plate and 850K psu. A 316 non coaxial splitter box is also required where more than 2 monitors are installed.