Convert 4 analogue camera outputs into H.264/ MPEG4/MPEG2/MJPEG format with up to 4CIF real time recording using the HIK-6701HFI Encoder. Capable of supporting multiple network protocols and connectable with Network HDD for LAN based recording storage. Features: H.264/MPEG4/MPEG2/MJPEG encoding standards supported Up to 4CIF real-time encoding One PoE network interface for DS-6701/6704HFI models Connectable with network HDD in NAS, IPSAN mode Support multiple network protocols, including IPv4/v6, HTTP, HTTPS, QoS layer3 DiffServ, FTP, SMTP, Bonjour, UPnP, SNMPv1/v2c/v3, OnVIF, PSIA, SOCKSv4/v5, etc.; Multiple PTZ protocols Specifications: DS-6704HFI Video/Audio input Video Compression:  H.264/MPEG4/MPEG2/MJPEG Video input:  4-ch,BNC (1.0 Vp-p, 75 Ω) Audio compression:  G.711 Audio input:  4-ch,Line input interface(2.0 Vp-p, 1 kΩ) Two-way audio:  1-ch, 3.5 mm audio (2.0 Vp-p, 1 kΩ) Video/Audio output Audio output:  1-ch, 3.5mm interface (Linear, 600 Ω) Encoding resolution:  4CIF/2CIF/CIF/QCIF Frame rate:  25 fps (P) / 30 fps/N Video bit rate:  32 Kbps ~ 3072 Kbps, or user defined (Max. 8192 Mbps) Audio bit rate:  64 Kbps Dual Stream:  Support Stream Type:  Video/ Video&Audio Network protocols Protocols Supported:  IPv4/v6, HTTP, HTTPS, QoS layer3 DiffServ, FTP, SMTP, Bonjour, UPnPTM,SNMPv1/v2c/v3(MIB-II), DNS, DynDNS, hkDDNS, NTP, RTSP, RTP/RTCP,TCP, UDP, IGMP, ICMP,DHCP, ARP, SOCKSv4/v5, PSIA, OnVIF, HIKCGI, netFilter Data storage Type:  NAS, iSCSI, IPSAN, MicroSD Capacity:  Up to 4 TB capacity for each disk, and 32GB for microSD storage External interface Network interface:  1 RJ-45 10 M / 100 Mbps adaptive Ethernetinterface (PoE) Serial interface:  1 half-duplex RS-485 interface 1 RS-232 interface Alarm in:  4 Alarm out:  2 General Power supply:  12 VDC, or PoE Consumption:  ≤ 7W Working temperature:  -10°C~+55°C(14°F~131°F) Working humidity:  10%~90% Dimension(W×D×H):  114 × 48 × 128 mm Weight(without HDD):  ≤ 1 Kg