4 channels dvr card dvr card, capture card, H.264, CCTV dvr card, PTZ control, security card, motion detection, missing object 4 channels dvr card dvr card, capture cardDUAL- ... x 384, 704 x 576Compression Format: H.264. Compression Ratio: 50 –120MB per hour per channelSupport OSD timely ... Protocol :TCP/UDP,Support IE browser,client site software,built-in DDNSSystem RequirementsCPU: Intel Celeron D 2. ...