Video/Audio Input
Audio Input:   4-ch
Video Compression:   H.264,H.264+H265
Analog and HD-TVI video input:   16-ch,BNC interface (1.0Vp-p, 75 Ω)connection
Supported camera types:   Support HDTVI input: 3MP,1080P/25Hz, 1080P/30Hz,720P/25Hz, 720P/30Hz, 720P/50Hz, 720P/60Hz,
Support AHD input: 1080P/25Hz, 1080P/30Hz, 720P/25Hz, 720P/30Hz
Support CVBS input
Video Input Interface:   BNC (1.0 Vp-p, 75Ω)
Audio Compression:   G.711u
Audio Input Interface:   4-ch, RCA (2.0 Vp-p, 1 KΩ)
Two-way Audio:   1-ch, RCA (2.0 Vp-p, 1 KΩ) (using audio input)
Video/Audio Output
CVBS Output:   1-ch,BNC(1.0Vp-p,75Ω),resolution:PAL:704x576,NTSC:704x480
HDMI/VGA Output:   HDMI: 1-ch,4K(3840×2160)/30Hz,2K(2560×1440)/60Hz, 1920×1080/60Hz, 1280×1024/60Hz,1280×720/60Hz,1024 ×768/60Hz
VGA:1-ch,2K(2560×1440)/60Hz,1920×1080/60Hz,1280×1024/60Hz,1280×720/60Hz,1024×768/60Hz
Recording resolution:   3 MP/1080p/720p/WD1/4CIF/VGA/CIF
Frame Rate:   Main stream: 
3 MP@15fps;
1080p/720p/WD1/4CIF/VGA/CIF@25fps (P)/30fps (N) 
Sub-stream:
WD1/4CIF@12fps;
CIF/QVGA/QCIF@25fps (P)/30fps (N)
Video Bit Rate:   32 Kbps-10 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
Playback Resolution:   3 MP/1080p/720p/VGA/WD1/4CIF/CIF
Synchronous Playback:   16-ch
Network management
Remote connections:   128
Network protocols:   TCP/IP, PPPoE, DHCP, Hik-connect Cloud P2P,DNS, DDNS, NTP, SADP, NFS, iSCSI, UPnP?, HTTPS
Hard Disk Driver
Interface Type:   2 SATA Interfaces
Capacity:   Up to 6TB 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
Alarm Input:   16-ch
Alarm Output:   4-ch
General
Power Supply:   12V DC
Consumption:   ≤ 20W(without hard disks)
Working Temperature:   -10 oC ~+55 oC (14 oF ~ 131 oF)
Working Humidity:   10% ~ 90%
Chassis:   Standard 1U chassis
Dimensions:   380 × 320 × 48 mm
(14.9 × 12.6 × 18.9 inch )
Weight:   ≤ 2 k g (4.4 lb) g