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:   8-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 of DS-7204HQHI-K1, for channel 1/2of DS-7208HQHI-K1, and for channel 1/2/3/4 of DS-7216HQHI-K1.
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
HDMI/VGA Output:   1920 × 1080 / 60 Hz,1280 × 1024 / 60 Hz, 1280 × 720 / 60 Hz, 1024 × 768 / 60 Hz
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)
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:   8-ch
Network management
Remote connections:   64
Network protocols:   TCP/IP, PPPoE, DHCP, Hik-connect Cloud P2P,DNS, DDNS, NTP, SADP, NFS, iSCSI, UPnP?, HTTPS,ONVIF
Hard Disk Driver
Interface Type:   1 SATA Interface
Capacity:   Up to 10 TB capacity for each disk
External Interface
Network Interface:   1; 10M / 100M self-adaptive Ethernet interface
USB Interface:   2 USB 2.0 Interfaces
Serial Interface:   1; standard RS-485 serial interface, half-duplex
General
Power Supply:   12 VDC
Consumption:   ≤ 7.5W(without hard disks)
Working Temperature:   -10 oC to +55 oC (14 oF to 131 oF)
Working Humidity:   10% to 90%
Dimensions:   315 × 242 × 45 mm (12.4 × 9.5 × 1.8 inch)
Weight:   ≤ 1.78 kg (3.9 lb)