brands HIKVISION Video/Audio Input Audio Input : 1-ch Video Compression:  H.265 Pro /H.265 Pro/H.265/H.264 /H.264 Analog and HD-TVI video input: 4-ch,BNC interface (1.0Vp-p, 75 Ω)connection Supported camera types:  4 MP, 3 MP, 1080p25, 1080p30, 720p25, 720p30, 720p50, 720p60 Support AHD input: 4 MP, 1080p25, 1080p30, 720p25, 720p30 Support CVI input: 4 MP, 1080p25, 1080p30, 720p25, 720p30 support CVBS input Video Input Interface: BNC (1.0 Vp-p, 75Ω) Audio Compression: G.711u Audio Input Interface:  RCA (2.0 Vp-p, 1 kΩ) Two-way Audio: 1-ch, RCA (2.0 Vp-p, 1 KΩ) (using audio input) Video/Audio Output HDMI/VGA Output:  1920 × 1080 / 60 Hz,1280 × 1024 / 60 Hz, 1280 × 720 / 60 Hz, 1024 × 768 / 60 Hz Recording 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/CIF Frame 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/VGA/WD1/4CIF/CIF@15fps For 1080p stream access: 1080p/720p@15fps; VGA/WD1/4CIF/CIF@25fps (P)/30fps (N) For 720p stream access: 720p/VGA/WD1/4CIF/CIF@25fps (P)/30fps (N) When 1080p Lite mode enabled: 4 MP lite/3 MP@15fps; 1080p lite/720p lite/VGA/WD1/4CIF/CIF@25fps (P)/30fps (N) Video Bit Rate:  32 Kbps-6 Mbps Stream Type:  Video/Video&Audio Audio Output:  1-ch RCA(Linear, 1kΩ) Audio Bit Rate:  64kbps Dual Stream:  Support Synchronous Playback:  4-ch Network management Remote connections:  32 Network protocols:  TCP/IP, PPPoE, DHCP, Hik-Connect, DNS, DDNS, NTP, SADP, NFS, iSCSI, UPnP?, HTTPS, ONVIF Hard Disk Driver Interface Type: 1 SATA Interface Capacity:  Up to 4TB capacity for each disk External Interface Network Interface: 1; 10M / 100M self-adaptive Ethernet interface USB Interface:  2 USB 2.0 Interfaces General Power Supply:  12V DC Consumption:  ≤ 8W(without hard disks) Working Temperature:  -10 oC ~ 55 oC (14 oF ~ 131 oF) Working Humidity:  10% ~ 90% Chassis: Mini 1U chassis Dimensions:      200 × 200 × 45 mm (7.9 × 7.9 × 1.8 inch) Weight: ≤ 1 kg (2.2 lb)