Q-See QSD2316L-320 16-Channel H.264 Pentaplex Network DVR with Mobile Phone Surveillance, Remote Internet Monitoring and Pre-Installed 320GB HDD H.264 Compression Remote monitoring through IE Browser, and Mobile phone surveillance on WinCE & 3G USB mouse function with User Interface; and 4 Audio Inputs/1 Audio Output Various recording modes, and backup through USB port Pre-installed 320GB hard drive