Video/Audio Input
Audio Input:   1-ch
Video Compression:   H.265 Pro+/H.265 Pro/H.265/H.264+/H.264
Analog and HD-TVI video input:   16-ch,BNC interface (1.0Vp-p, 75 Ω)connection
Supported camera types:   Support HDTVI input: 4 MP, 3 MP, 1080p30, 1080p25, 720p60, 720p50, 720p30, 720p25
Note: The 3 MP signal input is only available for channel 1/2 of DS-7208HQHI-K2, and for channel 1/2/3/4 of DS-7216HQHI-K2.
Support AHD input: 4 MP, 1080p25, 1080p30, 720p25, 720p30
Support CVI input: 1080p25, 1080p30, 720p25, 720p30
Support CVBS input
Video Input Interface:   BNC (1.0 Vp-p, 75Ω)
Audio Compression:   G.711u
Audio Input Interface:   RCA (2.0 Vp-p, 1 kΩ)
Two-way Audio:   1-ch, RCA (2.0 Vp-p, 1 KΩ), (using the 1st channel of audio input)
Video/Audio Output
CVBS Output:   1-ch,BNC(1.0Vp-p,75Ω),resolution:PAL:704x576,NTSC:704x480
HDMI/VGA Output:   VGA: 1-ch, 1920 × 1080/60Hz, 1280 × 1024/60Hz, 1280 × 720/60Hz, 1024 × 768/60Hz
HDMI: 1-ch, 4K (3840 × 2160)/30Hz, 2K (2560 × 1440)/60Hz, 1920 × 1080/60Hz, 1280 × 1024/60Hz, 1280 × 720/60Hz, 1024 × 768/60Hz
Recording resolution:   When 1080p Lite mode not enabled:
4 MP lite/3 MP/1080p/1080p lite/720p/WD1/4CIF/VGA/CIF
When 1080p Lite mode enabled:
4 MP lite/3 MP/1080p lite/720p/720p lite/WD1/4CIF/VGA/CIF
Frame Rate:   Main stream:
When 1080p Lite mode not enabled: 
For 4 MP stream access: 4 MP lite@15fps; 1080p lite/720p/WD1/4CIF/VGA/CIF@25fps (P)/30fps (N) 
For 3 MP stream access: 3 MP/1080p/720p/VGA/WD1/4CIF/CIF@15fps>For 1080p stream access: 1080p@15fps; 720p/VGA/WD1/4CIF/CIF@25fps (P)/30fps (N)
For 720p stream access: 720p/VGA/WD1/4CIF/CIF@25fps (P)/30fps (N)
When 1080p Lite mode enabled: 
4 MP lite/3 MP@15fps; 1080p lite/720p lite/VGA/WD1/4CIF/CIF@25fps (P)/30fps (N)
Sub-stream: 
WD1/4CIF@12fps; CIF@25fps (P)/30fps (N)
Video Bit Rate:   32 Kbps-6 Mbps
Stream Type:   Video/Video&Audio
Two-way Audio:   1-ch, RCA (2.0 Vp-p, 1 kΩ) (using the audio input)
Audio Output:   1-ch RCA(Linear, 1kΩ)
Audio Bit Rate:   64kbps
Dual Stream:   Support
Synchronous Playback:   16-ch
Network management
Remote connections:   128
Network protocols:   TCP/IP, PPPoE, DHCP, Hik-Connect, DNS, DDNS, NTP, SADP, NFS, iSCSI, UPnP?, HTTPS, ONVIF
Hard Disk Driver
Interface Type:   2 SATA Interfaces
Capacity:   Up to 10 TB capacity for each disk
External Interface
Network Interface:   1; 10M / 100M / 1000M self-adaptive Ethernet interface
USB Interface:   1 USB 2.0 Interface & 1 USB 3.0 Interface
Serial Interface:   1; standard RS-485 serial interface, half-duplex
General
Power Supply:   12 VDC
Consumption:   ≤ 25W(without hard disks)
Working Temperature:   -10 oC to +55 oC (14 oF to 131 oF)
Working Humidity:   10% to 90%
Dimensions:   380 × 320 × 48 mm (15.0 × 12.6 × 1.9 inch)
Weight:   ≤ 2 kg (4.4 lb)