Hyperkin's HDMI adapter converts the Dreamcast's 31KHz 720x480 VGA mode to an HDMI connector supported by more TVs. Note that a 720x480 display mode via HDMI may not be supported by all TVs - they should support it but we can't guarantee that.

Note that not all games support VGA mode, and some games may not support a Widescreen display mode over VGA - ex. Tokyo Xtreme Racer 2 / Shutokou Battle 2 only supports Widescreen in a 15KHz mode (RF, Composite, S-Video & RGB). Konami games are known to work only in 15KHz mode.