This Mini DisplayPort to HDMI adapter seamlessly connects both video and audio outputs from Mini DisplayPort or Thunderbolt-equipped computers to a HDMI display, TV or projector. The built in sound card feeds digital sound directly into the HDMI signal making it ideal for use with older computers that can\'t output audio through Mini DisplayPort. Perfect for watching movies or video from your PC on an HD Plasma or LCD screen. It also allows you to create extra desktop workspace by extending your display on to an HD screen or to improve your multi tasking abilities by mirroring to an additional display. USB power reduces unnecessary cable clutter and gives you a true audio video experience with full HD 1080p video and uncompressed audio support.