DS-7716NI-I4 Specification
Video/Audio input	IP video input: 16-ch, Up to 12 MP resolution Two-way audio: 1-ch, RCA (2.0 Vp-p, 1kΩ)
Network	Incoming bandwidth: 160 Mbps Outgoing bandwidth: 256 Mbps Remote connection: 128
Video/Audio output	Recording resolution: 12 MP/8 MP/6 MP/5 MP/4 MP/3 MP/1080p/UXGA/720p/VGA/4CIF/DCIF/2CIF /CIF/QCIF   HDMI output resolution: 4K (3840 × 2160)/60Hz, 4K (3840 × 2160)/30Hz, 1920 × 1080p/60Hz, 1600 × 1200/60Hz, 1280 × 1024/60Hz, 1280 × 720/60Hz, 1024 × 768/60Hz   VGA output resolution: 1920 × 1080p/60Hz, 1280 × 1024/60Hz, 1280 × 720/60Hz, 1024 × 768/60Hz   Audio output: 1-ch, RCA (Linear, 1 KΩ)
Decoding	Decoding format: H.265/H.264/MPEG4   Live view / Playback resolution: 12 MP/8 MP/6 MP/5 MP/4 MP/3 MP/1080p/UXGA/720p/VGA/4CIF/DCIF/2CIF /CIF/QCIF   Synchronous playback: 16-ch   Capability: 4-ch @ 4K, or 16-ch @ 1080p
Hard disk	SATA: 4 SATA interfaces for 4HDDs Capacity: Up to 6TB capacity for each HDD
External interface	Network interface: 2 RJ-45 10/100/1000 Mbps self-adaptive Ethernet interfaces Serial interface: 1 RS-485 (half-duplex), 1 RS-232 USB interface: Front panel: 2 × USB 2.0; Rear panel: 1 × USB 3.0 Alarm in/out: 16/4
General	Power supply: 100 to 240 VAC Power: ≤80 W Consumption (without hard disk): ≤20 W Working temperature: -10 to +55ºC (14 to 131ºF) Working humidity: 10 to 90 % Chassis: 19-inch rack-mounted 1.5U chassis Dimensions (W × D × H): 445 × 390 ×70 mm ( 17.5"× 15.3" × 2.8")