... 4ch/8ch/16ch 32ch DVR 8CH H.264 DVR Recorder 1. 4ch/8ch/16ch DVR,Realtime,H.264,Network,VGA 2. 3G mobile view,CMS Software 3. Multi-language menu,2/4/8X1500GB SATA HDD Support ... .1 port,provide the video files backup,support USB flash disk and USB hard disk.Support preview of single channel and multi-channels display, support single channel switch ...