Intercom universal compatible with the majority of citofoni products by major world producers. Ideal in replacements and repairs of facilities citofoniche. Key conversation on the basis, adjusting volume of call and privacy. It has apriporta button and button for additional services with independent joint, which can add up to 8 buttons which led additional 4; has regulator volume for speaker and microphone volume for the regulator to meet any need; can be used both for plants with common positive for plants with common negative; can replace citofoni with condenser microphone and capsule coal; has called electronic or mechanical call through ronzatore. In this model, you can replace the cover. Size: 95x215x58 mm