H.264 /MJPEG4 dual codec, up to 16 IP camera inputs, max 100Mbps Bit Rate Input, max 12 channel 720P or 6 channel 1080P playback, 19-inch rack-mounted 1U case; I/O: 4  input / 1 output;   16 independent POE  network interfaces;HDMI ,VGA output to 1080P,2 SATA HDD ports(up to 4TB), 2 USB2.0