Video/Audio InputAudio Input:|4-chVideo Compression:|H.264,H.264+Analog and HD-TVI video input:|8-ch,BNC interface (1.0Vp-p, 75 Ω)connectionSupported camera types:|3MP,720P25, 720P30, 720P50, 720P60, 1080P25, 1080P30, CVBSVideo Input Interface:|BNC (1.0 Vp-p, 75Ω)Audio Compression:|G.711uAudio Input Interface:|8-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 OutputCVBS Output:|1-ch,BNC(1.0Vp-p,75Ω),resolution:PAL:704x576,NTSC:704x480HDMI/VGA Output:|1-ch, 4K (3840 × 2160)/30Hz, 2K (2560 ×
1440)/60Hz, 1920 × 1080/60 Hz, 1280 ×
1024/60 Hz, 1280 × 720/60Hz, 1024 ×
768/60 HzRecording resolution:|Mainstream:5MP@12fps/3Mp@15fps/1080p/720p/WD1/4CIF
Sub-stream:WD1/4CIF@12fps(non-real-time);CIF/QVGA/QCIF(real-time)Frame Rate:|Main stream:25fps(p)/30fps(N)
Sub-sream:WD1/4CIF@12fps(non-real-time);CIF/QVGA/QCIF(real-time)Video Bit Rate:|32 Kbps-10 MbpsStream Type:|Video/Video&AudioTwo-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:|64kbpsDual Stream:|SupportPlayback Resolution:|5MP/3MP/1080P/720P / VGA / WD1 / 4CIF / CIF / QVGA / QCIFSynchronous Playback:|8-chNetwork managementRemote connections:|128Network protocols:|TCP/IP, PPPoE, DHCP, Hik-connect Cloud P2P,DNS, DDNS, NTP, SADP, NFS, iSCSI, UPnP™, HTTPS,ONVIFHard Disk DriverInterface Type:|1 SATA InterfaceCapacity:|Up to 6 TB capacity for each diskExternal InterfaceNetwork Interface:|2; 10M / 100M / 1000M self-adaptive Ethernet interfacesUSB Interface:|1 USB 2.0 Interface & 1 USB 3.0 InterfaceSerial Interface:|1; standard RS-485 serial interface, half-duplexAlarm Input:|4-chAlarm Output:|1-chGeneralPower Supply:|12V DCConsumption:|≤ 20W(without hard disks)Working Temperature:|-10 ºC ~+55 ºC (14 ºF ~ 131 ºF)Working Humidity:|10% ~ 90%Chassis:|Standard 1U chassisDimensions:|315 × 242 × 45 mm 
(12.4 × 9.5 × 1.8 inch) Weight:|≤2 kg(4.4lb)