PVI VECOAX MICROMOD MS A Single Channel HD Digital AIR ATSC RF Modulator HD RF Modulator for HD Video & Dolby Digital Audio distribution to any TV via Antenna Cables HDMI / Component / Composite LR selectable inputs up to 1080p Auto Resolution ATSC Digital AIR RF signal out selectable to any channel number Full Support For Dolby Sound for Perfect audio quality Perfect replacement for any old analog RF modulator for Full HD Distribution