Digimerge Technologies' DHU-500 series includes four-, eight- and 16-channel pentaplex network DVRs. The products feature a built-in DVD-RW, VGA output, 250 GB HDD and GUI interface with mouse navigation. The DVRs offer 480 fps live view and 120 fps record capabilities. MPEG-4 video compression allows for efficient file transfer. The DVRs supports up to 1 TB of internal data storage.