The Monolith C a/b door intercoms impress with their timeless design, high-quality craftsmanship, and reliability. They can be mounted on the surface or flush-mounted, with no screws visible on the front panel.

Not only is the design convincing, but the functionality is impressive as well. Features such as the connection option for an existing doorbell, automatic day-night switching, and the ability to end the door call immediately without ringing again when opening the door are just a few of the many functions available.

Main features:

• Connection to an analog extension
• Power supply for the intercom electronics via the telephone system
• Programming via telephone or with an optional USB cable
• 2 integrated potential-free relays for door opening or additional bell
• Call termination by code is possible, with no busy tones audible
• Volume of the microphone and speaker is electronically adjustable.