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