ADV 411S, 4 Channels H.264 USB Network DVR Standalone with VGA Output, provides clearer video & faster transmission for you. ADV 411S a valuable user friendly & multi-functional DVR that allows you to do Pen drive back-up, PTZ control, USB mouse control & remote access via IE, CMS & Video mobile phone. In addition, it consists of watch dog, video loss detection & power loss recovery features.