The HD HomeRun Dual- Two Digital Tuners, Anywhere on Your Network: Watch TV from any computer on your network, Record full 1080i broadcast resolution, Watch, Pause, Record, and Rewind Live TV, Schedule and record all your favorite TV shows, Expand # of tuners with multiple HDHomeRun devices. TV sources: ATSC digital TV (antenna), Unencrypted digital cable TV (Clear QAM). Works with popular DVR software: Watch, Pause, Record, and Rewind Live TV, Schedule future or season recordings, Record all your favorite TV shows by name, Integrated TV guide (provided by the DVR software), Never miss your favorite show. Seamless operation with multiple computers: Run Windows Media Center on multiple computers sharing the pool of HDHomeRun tuners, Tuners are automatically allocated between computers as needed, Multiple HDHomeRun units can be used together to expand the number of tuners, Tuner pooling works with Windows Media Center, Free software / firmware upgrade available for download Compatible with: Windows Media Center, Elgato EyeTV - DVR for Mac, MythTV - DVR for Linux, SnapStream BeyondTV- DVR for Windows, SageTV- DVR for Windows/Linux/Mac, MediaPortal - DVR for Windows, GB-PVR - DVR for Windows. VLC - Multi-platform media viewer TSReader. MPEG-2 transport stream analysis. Specifications: 8-VSB (ATSC over-the-air digital TV), QAM64/256 (unencrypted digital cable TV), 100baseTX high speed network, 1 year warranty Requirements: Dual core recommended for HD playback, 1 GB RAM recommended, 1-4 GB per 1/2 hour of DTV recording .