Q-See QSD2304L-320 4 Channel H.264 Pentaplex Network DVR w/Real-time Recording, Mobile Phone Surveillance & Pre-installed 320GB HDD Record and Display at 120 FPS H.264 Compression (CIF) Real-time Recording Per Channel USB Mouse Function, or Backup to Flash Drive, External Harddrive or CD/DVD-RW Access this DVR remotely through cell phones with WinCE and Symbian Operating Systems on 3G network systems. Pre-installed 320GB Hard Drive