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 input4MP,3 MP, 1080p/25Hz, 1080p/30Hz, 720p/25Hz, 720p/30Hz, 720P/50Hz, 720p/60Hz Note: The 3 MP signal input is only available for channel 1/2/3/4. Support AHD input: 4MP,1080p/25Hz, 1080p/30Hz, 720p/25Hz, 720p/30Hz Support CVI input: 1080p25, 1080p30, 720p25, 720p30 support CVBS inputVideo Input Interface|BNC (1.0 Vp-p, 75Ω)Audio 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|When 1080p Lite mode not enabled: 4 MP lite/3 MP/1080p/1080p lite/720p/WD1/4CIF/VGA/CIF When 1080p Lite mode enabled: 4 MP lite/3 MP/1080p lite/720p/720p lite/WD1/4CIF/VGA/CIFFrame Rate|Main stream: When 1080p Lite mode not enabled: For 4 MP stream access: 4 MP lite@15fps; 1080p lite/720p/WD1/4CIF/VGA/CIF@25fps (P)/30fps (N) For 3 MP stream access: 3 MP/1080p/720p/WD1/4CIF/VGA/CIF@15fps For 1080p stream access: 1080p/720p@15fps; 720p/WD1/4CIF/VGA/CIF@25fps (P)/30fps (N) For 720p stream access: 720p/WD1/4CIF/VGA/CIF@25fps (P)/30fps (N) When 1080p Lite mode enabled: For 4 MP stream access: 4 MP lite@15fps; 1080p lite/720p lite/WD1/4CIF/VGA/CIF@25fps (P)/30fps (N) For 3 MP stream access: 3 MP/1080p lite/720p lite/WD1/4CIF/VGA/CIF@15fps For 1080p stream access: 1080p lite/720p lite/WD1/4CIF/VGA/CIF@25fps (P)/30fps (N) For 720p stream access: 720p/WD1/4CIF/VGA/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) (independent)Audio Output|1-ch RCA(Linear, 1kΩ)Dual Stream|SupportSynchronous 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|1; 10M / 100M / 1000M self-adaptive Ethernet interfaceUSB 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|≤ 45 WWorking 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)