Audio Input|4-chVideo Compression|H.265 Pro+/H.265 Pro/H.265/H.264+/H.264Analog and HD-TVI video input|24-ch,BNC interface (1.0Vp-p, 75 Ω)connectionSupported camera types|Support HDTVI input8 MP, 5 MP, 4 MP, 3 MP, 1080p25, 1080p30, 720p25, 720p30, 720p50, 720p60 Support AHD input: 5 MP, 4 MP, 1080p25, 1080p30, 720p25, 720p30 Support CVI input: 4 MP, 1080p25, 1080p30, 720p25, 720p30 support CVBS inputAudio Compression|G.711uAudio Input Interface|4-ch, RCA (2.0 Vp-p, 1 KΩ)CVBS Output|1-ch,BNC(1.0Vp-p,75Ω),resolution:PAL:704x576,NTSC:704x480HDMI2 Output|1-ch,4K(3840 × 2160)/30Hz,2K(2560 × 1440)/60Hz,1920×1080/60Hz,1280 × 1024/60Hz,1280 × 720/60Hz, 1024 × 768/60HzHDMI/VGA Output|1920 × 1080 / 60 Hz,1280 × 1024 / 60 Hz, 1280 × 720 / 60 Hz, 1024 × 768 / 60 HzRecording resolution|8 MP/5 MP/4 MP/3 MP/1080p/720p/WD1/4CIF/VGA/CIFFrame Rate|Main stream: 8 MP@8fps/5 MP@12fps; 4 MP@15fps; 3 MP@18fps; 1080p/720p/WD1/4CIF/VGA/CIF@25fps (P)/30fps (N) Sub-stream: WD1/4CIF/CIF@25fps (P)/30fps (N)Video Bit Rate|32 Kbps-6 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)Dual Stream|SupportPlayback Resolution|8MP/5MP/4MP/3MP/1080p/720p/WD1/4CIF/VGA/CIFSynchronous Playback|16-chRemote connections|128Network protocols|TCP/IP, PPPoE, DHCP, Hik-connect Cloud P2P,DNS, DDNS, NTP, SADP, NFS, iSCSI, UPnP?, HTTPS,ONVIFInterface Type|4 SATA InterfacesCapacity|Up to 10 TB capacity for each diskNetwork Interface|2; 10M / 100M / 1000M self-adaptive Ethernet interfacesUSB Interface|2 USB 2.0 Interface on the front panel& 1 USB 3.0 Interface on the rear panelSerial Interface|1 RS-232 serial interface 1 RS-485 serial interface, full-duplex,1 RS-485 keyboard interfaceAlarm Input|16-chAlarm Output|4-chPower Supply|100 to 240 VACConsumption|≤ 74W(without hard disks)Working Temperature|-10 oC to +55 oC (+14 oF to +131 oF)Working Humidity|10% to 90%Dimensions|440 × 390 × 70 mm (17.3 × 15.4 × 2.8 inch)Weight|≤ 7 kg (15.4 lb)