... ADPCMAudio InputRCA , 9 channelAudio OutputRCA , 1 channelStorage&backupHDD Port2 SATA port, support up to 6000GBackup DeviceUSB2.0 U disk/Network downloadUSBUSB ... , Buzzer, PTZ control, Email, FTP uploadNetworkNetwork Port1 RJ45 10M/100M Ethernet portNetwork FunctionsTCP/IP, PPPoE, DHCP , DDNS, UPnP, SMTP, FTPRemote Control ...