GDX5 Audio System Expansion Units (SEU) contain all the relevant control equipment to support up to seven Entrance Panels and increase the number of connected handsets depending on your system options. SEU designed for 1 Entrance Panel support Audio only or Audio & Video calling options Concierge option available with 7 Audio channel system Single high-security and key locked sheet steel enclosure Supports 7Ah battery backup (battery not supplied)
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