• Video/Audio Input
• Video Compression H.264/MPEG4/MPEG2/MJPEG
• Video Input 1-ch, BNC (1.0 Vp-p, 75 Ω)
• Audio Compression G.711u
• Audio Input 1-ch, 3.5 mm interface (2.0 Vp-p, 1 k Ω) (LINE IN)
• Two-Way Audio Input 1-ch, 3.5 mm interface (2.0 Vp-p, 1 k Ω) (LINE IN)
• 
  Video/Audio Output
• 
  
• Audio Output 1-ch, 3.5 mm interface (linear, 600 Ω)
• Recording Resolution 4CIF/2CIF/CIF/QCIF
• Frame Rate 25 fps (P)/30 fps/N
• Video Bit Rate 32 Kbps to 3072 Kbps or user defined (maximum 8192 Mbps)
• Audio Bit Rate 64 Kbps
• Dual-Stream Supported
• Stream Type Video, Video and Audio
• 
  Data Storage
• Type NAS, iSCSI, IPSAN, microSD
• Capacity Up to 4 TB capacity for each disk, and 32 GB for microSD storage
• 
  External Interface
• Network Interface 1 RJ-45 10 M/100 Mbps adaptive Ethernet interface (PoE)
• Protocols IPv4/v6, HTTP, HTTPS, QoS layer3 DiffServ, FTP, SMTP, Bonjour, UPnP, SNMPv1/v2c/v3(MIB-II), DNS, DynDNS, hkDDNS, NTP, RTSP, RTP/RTCP, TCP, UDP, IGMP, ICMP, DHCP,
  ARP, SOCKSv4/v5, PSIA, OnVIF, Hik CGI, netFilter
• Serial Interface 1 half-duplex RS-485 interface
• Alarm In1
• Alarm Out 1
• 
  General
• Power Supply 12 VDC, 1 A
• Consumption≤5 W
• Working Temperature -10° to +55° C
• Working Humidity10% to 90%
• Dimensions (W ×D × H) 80 mm × 39 mm × 90 mm.
  315 mm × 45 mm × 200 mm (for -SATA model)
• Weight≤0.5 kg