... , network transmission, mobile phone surveillance4. Support backup with USB Flash Disk, Movable hard discus writer, Network 5. Support 1channel. Main output, 1channel ... ),CIF D1(352*240)Playback1/4 CH playback simultaneouslyBackupUSB Flash disk, Movable hard disk, Built-in DVD writer(optional),NetworkAlarm Input/Output16CH/1CHSPOT ...