The 4891A from Cyrex is a iPower external Audio/Video unit with 1 P.B. External unit with 1/ 4” CCD color camera, white LED illumination, loudspeaker volume control and aluminium call pushbutton with name label. 2 relays (C NO-NC contacts) are available and may be directly activated through the monitor. Complete with die-cast aluminium module frame and flushmounting box. Dimensions: 4.9“x8.5“x6.1“.
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