Hikvision Technical Manual 2. Model Description DS-8004HDI-S: 4-ch video and audio input; support up to 4CIF encoding resolution; it has 8 SATA interfaces DS-8008HDI-S: 8-ch video and audio input; support up to 4CIF encoding resolution; it has 8 SATA interfaces DS-8016HDI-S: 16-ch video and audio input;...