Hikvision Technical Manual 2. Model Description DS-7004HI-S: 4-ch video input and 4-ch audio input. 1-ch composited video output and 1-ch spot video output. 4-ch video loop out. Support one VGA output. 4 SATA HDD supported. DS-7008HI-S: 8-ch video input. 1-ch video output and 1-ch spot video output.
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