... transmission, mobile phone surveillance5. Support backup with USB Flash Disk, Movable hard disk, USB writer, Network6. Support 1channel. Main output, ... (Optional playback channel)Recording BackupUSB,Moved Hard Disk,USB Writer,NetworkNetwork transmission4Channels real-time Network transmission ... HintSupportNetwork and Protocol1 RJ-45 10/100M via Ethernet, Support TCP/IP,PPPOE,DHCP,DNS,DDNS, ...