... BNCTwo-way Talk1 channel Input, 1 channel Output, BNCDisplayInterface1 HDMI, 1 VGA, 1 TV, BNCLCD/5.6-inch color ... , Backup selection, Digital zoomBackup ModeUSB Device / NetworkNetworkEthernetRJ-45 port (10/100M)Network FunctionsTCP/IP, UDP, DHCP, DNS, ... eSATA portAuxiliary InterfaceUSB2 ports (1 Rear), USB2.0RS2321 port, For PC communication & KeyboardRS4851 port, For PTZ controlGeneralPower SupplyAC ...