4CH security DVR 1CH audio dvr real time system DDNS RS 485 ... phone view Support 1 SATA port HDD MAX 2000GB 4CH security DVR, 4-CH DVR, cctv dvr4CH video and 1CH Audio ... , mouse operation supportivedisplay1/4image displayVideoVideo standardPAL 625line,50 f/s;NTSC 525 line,60 f/sSurveillance image qualityPAL, D1(704x576);NTSC, D1 ...