NVR (2way audio), 2 port USB 2.0,  64 Channel IP Video Input.  1 Audio Channel Output.  200 Mbps Input Bandwidth,  160 Mbps Output Bandwidth.  HDMI, VGA Video, CVBS Output.  8 SATA & 1 eSATA Interface Up to 4TB capacity for each HDD,  RS 485 for control PTZ camera.  Up to 5 MP resolution recording.  2 Port Ethernet 10/100/1000 Mb/S.  16 alarm input / 4 alarm output​