... Network 6. Support 1channel. Main output, 1channel. VGA output7. Support video channel hidden and S.E.Q for single channel 8 ... Recording BackupUSB,Moved Hard Disk,USB Writer,NetworkNetwork transmission4Channels real-time Network transmission with CIF resolutionRecording PlaySpecial player, Support AVI ... Humidity10%-90%LCD Size15inch, 4:3, CCFL, XGA 4CH real time lcd monitor dvr recorder (GRT-DK7504MH)