... , playback, backup, network transmission, mobile phone surveillance4. Support backup with USB Flash Disk, Movable hard discus writer, Network 5. Support 1channel ... ),CIF D1(352*240)Playback 1/4/8 playback simultaneouslyBackup USB Flash disk, Movable hard disk, Built-in DVD writer(optional ... PELCO-D,PELCO-PRS-232 SupportHDD 4 SATA HDD or 3 HDD 1 eSATA or 2 SATA HDD 1 Built-in DVD write 1 eSATA ...