... D1 DVR 2.Mobile remote monitor 3.VGA,PTZ,USB 4.CE Factory direct sales High-end 16CH Full ... , backup, network transmission, mobile phone surveillance4. Support backup with USB Flash Disk, Movable hard discus writer, Network 5. Support 1channel. Main ... D1(352*240)Playback1/4 CH playback simultaneouslyBackupUSB Flash disk, Movable hard disk, Built-in DVD writer(optional),NetworkAlarm Input/Output16CH ...