DVR network dvr,digital video recorder RS 485 Control,RJ45,with VGA, remote control 3G cellphone view,H.264 two way audio DVRnetwork dvr,digital video recorder16CH video and 3CH Audio 1CH Two way Audio real time Recording and displayH.264 comperssion formatvideo input/output: 16ch/1CH Audio input: 4chvideo recording: PAL: 400 frames/sec. NTSC: 480 frames/secRS-485 control: supportremote control: ...