Dual tuner PCI Express NTSC/ATSC/QAM TV tuner board for Windows Vista. Watch and record analog cable TV plus hi-definition ATSC or clear QAM digital TV on your PC- Dual tuner TV board for your PC: one analog TV tuner and one digital TV tuner- Single slot PCI Express (PCIe) X1 board, full height- Built-in hardware MPEG-2 encoder for recording analog cable TV, for the best system performance- Watch and record all ATSC formats, including the highest definition 1080i format- Supports clear QAM digital cable TV channels with the new WinTV v6 applicationWinTV-HVR-1800 has these great features- Watch and record ATSC high definition digital TV or analog cable TV on your PC, in a window or full screen ATSC HD is the over-the-air high definition TV standard for North America.- Watch and record 'clear QAM' digital TV channels. Clear QAM digital TV channels are TV channels which are broadcast "in the clear" on your cable TV network.- Two tuners on board: a 125 channel cable ready TV tuner and an ATSC/QAM digital TV tuner.- Includes Hauppauge's WinTV v6 application, which allows you to toggle between analog cable TV, QAM and ATSC digital TV channels.ATSC Digital TV features- ATSC over-the-air digital TV tuner built-in. Supports all ATSC formats, up to the high definition 1080i format- Supports Dolby Digital AC3 audio- Record ATSC digital TV to your PC's hard disk using high quality MPEG-2. TV recordings will typically consume 5 GB of disk space per hour for ATSC high definition.Analog TV features- Built-in high quality hardware MPEG-2 encoder, so your PC continues to run at full speed while watching, pausing and recording analog cable TV- 125 channel cable ready TV tuner built-in. With dbx-TV stereo decoder, for great TV sound.- Composite/S-Video and audio inputs, for cable or satellite set top boxes or VCRs.