Q-See QSTD5304C4-320 Observation System Includes LCD Monitor with 4-Channel H.264 Network DVR, 4 Color CCD Camera Kits and Pre-installed 320GB HDD H.264 Compression with CIF Real-time Recording Per Channel Remote viewing through IE Browser, and Mobile phone surveillance with WinCE or Symbian OS on 3G networks Various recording modes and backup through USB flash drive or hard drive 4 Color CCD camera kits (420 TVL resolution) with Sony image sensors, and up to 30 feet night vision each Pre-installed 320GB hard drive