... Standalone DVR H.264 Algorthm, Pentaplex 3.Support Internal CD / DVD-RW 4.USB Backup Standalone DVR AST-DVR0404LN 4-Channel Standalone ... DVR H.264 Algorthm, Pentaplex, Support Internal CD / DVD-RW , USB Backup, SATA portIN:16 Ch Video,4 Audio;OUT ... full screen during playbackBackup ModeFlash disk/ USB HDD/ USB CD/DVD-RW/ built-in SATA Burner/ Network downloadNetwork