1.8-Channel Standalone DVR 2.H.264 Algorthm,Pentaplex,Support Internal CD/DVD-RW,USB ... 3IN:8 Ch Video,4 Audio 8-Channel Standalone DVR AST-DVR0804LN H.264 Algorthm , Pentaplex, Support Internal CD / DVD-RW , ... Second at CIF Resolution, AC 110-260V Main ProcessorHigh performance embedded microprocessorOperating SystemEmbedded LINUXSystem ResourcesPentaplex function: live, recording, playback, backup ...