Audio Input|1-chVideo Compression|H.264,H.264+Analog and HD-TVI video input|16-ch BNC interface (1.0Vp-p, 75 Ω)IP Video Input|2-ch (up to 18-ch)Audio Compression|G.711uAudio Input Interface|RCA (2.0 Vp-p, 1 kΩ)Two-way Audio|1-ch, RCA (2.0 Vp-p, 1 KΩ) (using audio input)HDMI/VGA Output|1920 × 1080 / 60 Hz,1280 × 1024 / 60 Hz, 1280 × 720 / 60 Hz, 1024 × 768 / 60 HzEncoding resolution|When 1080p lite mode not enabled720p/WD1/4CIF/VGA/CIF When 1080p lite mode enabled: 1080p lite/HD 720p lite/WD1/4CIF/VGA/CIFFrame Rate|Main stream: When 1080p lite mode enabled: 1080p lite/HD 720p lite/WD1/4CIF/VGA@12fps; CIF@25fps (P)/30fps (N) When 1080p lite mode not enabled: For 720p stream access: 720p/WD1/4CIF/VGA@12fps; CIF@25fps (P)/30fps (N) For SD stream access: WD1/4CIF/VGA/CIF@25fps (P)/30fps (N) Sub-stream: CIF/QVGA/QCIF@25fps (P)/30fps (N)Video Bit Rate|32 Kbps ~ 4 MbpsStream Type|Video/Video&AudioAudio Output|1-ch RCA(Linear, 1kΩ)Audio Bit Rate|64kbpsDual Stream|SupportSynchronous Playback|16-chRemote connections|128Network protocols|TCP/IP, PPPoE, DHCP, Hik-Connect, DNS, DDNS, NTP, SADP, SMTP, NFS, iSCSI, UPnP™, HTTPSInterface Type|1 SATA InterfaceCapacity|Up to 6 TB capacity for each diskNetwork Interface|1; 10M / 100M self-adaptive Ethernet interfaceUSB Interface|2 USB 2.0 InterfacesPower Supply|12V DCConsumption|≤20W(without hard disks)Working Temperature|-10 oC ~+55 oC (14 oF ~ 131 oF)Working Humidity|10% ~ 90%Dimensions|285 × 210 × 45 mm (11.2 × 8.3 × 1.8 inch)Weight|≤ 1.2 kg / 2.6 lb(without hard disks)