a.H.264 video compression b. VGA interface c. support over 10 languages d. 4ch network dvr e ... . support six operation Key Feature - H.264 compression, VGA interface- with network & alarm output; support mouse, D1, CIF, QCIF ... simultaneously playbackDoubel FramesupportConnectorRJ45 10M/100M,RS485Hard Disk Interface2000GUSB Interface2 USB interface,support USB mouse,U disk,USB mobile hard diskVGA ...