Audio Input|4-chVideo Compression|H.265 Pro+/H.265 Pro/H.265/H.264+/H.264Analog and HD-TVI video input|4-ch,BNC interface (1.0Vp-p, 75 Ω)connectionSupported camera types|Support HDTVI input8MP,5Mp,4MP,3MP,1080P/25Hz, 1080P/30Hz,720P/25Hz, 720P/30Hz, 720P/50Hz, 720P/60Hz, Support AHD input: 5 MP, 4 MP, 1080p25, 1080p30, 720p25, 720p30 Support CVI input: 4 MP, 1080p25, 1080p30, 720p25, 720p30 Support CVBS inputVideo Input Interface|BNC (1.0 Vp-p, 75Ω)Audio Compression|G.711uAudio Input Interface|RCA (2.0 Vp-p, 1 kΩ)Frame 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) *: 8 MP@8fps is only available for channel 1 of DS-7204HUHI-K2. Sub-stream: WD1/4CIF/CIF@25fps (P)/30fps (N)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|SupportSynchronous Playback|4-chRemote connections|32Network protocols|TCP/IP, PPPoE, DHCP, Hik-connect Cloud P2P,DNS, DDNS, NTP, SADP, NFS, iSCSI, UPnP?, HTTPS,ONVIFInterface Type|2 SATA InterfacesCapacity|Up to 10 TB capacity for each diskNetwork Interface|1; 10M / 100M self-adaptive Ethernet interfaceUSB Interface|2 USB 2.0 InterfacesSerial Interface|1; standard RS-485 serial interface, half-duplexAlarm Input|8-chAlarm Output|4-chPower Supply|12V DCConsumption|≤ 10W(without hard disks)Working Temperature|-10 oC to +55 oC (14 oF to 131 oF)Working Humidity|10% to 90%Dimensions|380 × 320 × 48 mm (15.0 × 12.6 × 1.9 inch)Weight|≤ 1.16 kg (2.6 lb)