... channelDigital Zoom and PIPSupportMultiplex Operationlive, record, playback, backup, network transmission,mobile phone surveillanceDisplay ResolutionPAL:D1(704*576),NTSC:D1(704 ... and time period backupNetwork Transmission4 channels real-time Network transmission with CIF resolutionRecording PlaySupport Special player, Support AVI file ... .264 video compression 4 channels real-time Network transmission