• Video/Audio input
• Video compressionH.264+/H.264
• Video input16-ch, BNC interface (1.0Vp-p, 75 Ω), supporting coaxitron connection
• Supported HDTVI input 1080p/25Hz, 1080p/30Hz, 720p/25Hz, 720p/30Hz, 720P/50Hz, 720p/60Hz
• Supported AHD input 720p/25Hz, 720p/30Hz
• CVBS input Support
• IP video input 2-ch (up to 18-ch) Up to 4.0 MP resolution
• Audio compression G.711u
• Audio input 4-ch, RCA (2.0 Vp-p, 1 KΩ)
• 
  Video/Audio output
• CVBS output Support
• HDMI/VGA outputHDMI: 1-ch, 4K (3840 × 2160)/30Hz, 2K (2560 × 1440)/60Hz, 1920 × 1080/60 Hz, 1280 ×1024/60 Hz, 1280 × 720/60Hz, 1024 × 768/60 Hz
  VGA: 1-ch, 1920 × 1080/60 Hz, 1280 × 1024/60 Hz, 1280 × 720/60Hz, 1024 × 768/60 Hz
• Encoding resolutionWhen 1080p Lite mode not enabled: 1080p(non-real-time)/720p(non-real-time)/VGA/WD1/4CIF/CIF;
  When 1080p Lite mode enabled: 1080p lite/720p lite/VGA/WD1/4CIF/CIF
• Frame rate Main stream: 25fps(P)/30fps(N)
  Sub-stream: WD1/4CIF (non-real-time); CIF/QVGA/QCIF (real time)
• Video bit rate 32 Kbps to 6 Mbps
• Dual-stream Support
• Stream type Video, Video & Audio
• Synchronous playback16-ch
• 
  Network management
• Remote connections 128
• Network protocolsTCP/IP, PPPoE, DHCP, Hik-connect Cloud P2P, DNS, DDNS, NTP, SADP, NFS, iSCSI, UPnP™, HTTPS, ONVIF
• 
  Hard disk
• SATA 4 SATA interfaces
• eSATA Support
• Capacity Up to 6TB capacity
• 
  External interface
• Two-way audio input1-ch, RCA (2.0 Vp-p, 1 KΩ) (independent)
• Network interface 1, RJ45 10M/100M/1000M self-adaptive Ethernet interface
• USB interface 2 USB 2.0 on the front panel
  1 USB 3.0 on the rear panel
• Serial interface1 RS-232 serial interface
  1 RS-485 serial interface, full-duplex
  1 RS-485 keyboard interface
• Alarm in/out 16/4
• 
  General
• Power supply 100 to 240 VAC
• Consumption (without HDD)≤ 55 W
• Working temperature -10 ºC to +55 ºC (14 ºF to 131 ºF)
• Working humidity 10% to 90%
• Dimensions (W × D × H)445 × 390 × 70 mm (17.5 × 15.4 × 2.8 inch)
• Weight (without HDD)≤ 5 kg (11.0lb)
•