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The I/O Box interfaces the video monitoring card's 15 pin I/O socket to a terminal block. Allows for the easy hookup of digital inputs & outputs to the NV3000 & NV5000 video monitoring cards. Cable included. Audio Ext. Port (NDVR1AudExt or NDVR4AudExt) is required. Supports Four Sensors & Four Relays (i.e. infrared sensors, smoke detectors, proximity sensors, door sensors, etc.) Refere to NV3000 or NV5000 users manuals for details.
