Aiphone LEM-3 Open Voice Selective Call Master Intercom, Accepts Up to Three Door or Sub-Master Intercoms
- Master intercom works with any combination of up to three door or sub-master intercoms (sold separately) to enable audio communication with visitors and other rooms within the building.
- Three buttons with LED indicators allow the master intercom to direct a call and communicate with the desired door or sub-master intercom.
- Listening feature allows the master intercom operator to receive audio transmission from a door or sub-master intercom at any time.