The byron vd series video door intercom with colour 24in tft monitor and metal outdoor camera is supplied with a surface mounting bracket the intercom features a lighted push button with name plate 1m night view with ir leds and has a button for door lock function door lock part code byrdb5005 supplied with 10 metres of cable that can be extended up to 30 metres in addition the intercom provides support for up to 2 monitors part number byrvd60 per button and adjustable bell volume comes with a 3