... mobile monitorin 4CH H.264 CCTV DVR with Mobile Access and USB (1)CPU:HI3515, Pure two-stream H.264 compression, stream ... (5)Duplex Voice talk back (6)Upgrade by USB,USB Backup ,Move HDD backup,USB-rw backup ,web backup(7)Multiplex Operation,Live ... by Network, remote control live, remote playback, remote control PTZ and remote menu setup (9)Support various types of mobile monitoring ...