... blank, video loss Easy backup: USB devices, network download Built-in web server, Support CMS, ... 3G), Iphone, Blackberry, Symbian Product SpecificationsModelDVR7604SSystemMain ProcessorHigh performance embedded microprocessorOperating SystemEmbedded LINUXSystem ResourcesPentaplex function: live, recording, ... weight:2.2kg (Exclude HDD) 4ch stand alone DVR with H.264 dual-stream video compression,4 ...