Mini DisplayPort to HDMI Adapter

This adapter will allow you to use a device with mini display port (like Mac book Air) with your HDTV's HDMI port, and it includes audio.

That's right, with any mini display port that outputs a video signal, and this adapter will take that signal and

Mini DisplayPort to HDMI Adapter

This adapter will allow you to use a device with mini display port (like Mac book Air) with your HDTV's HDMI port, and it includes audio.

That's right, with any mini display port that outputs a video signal, and this adapter will take that signal and feed it to the TV through a single HDMI port. No additional audio cables will be required. If your video source only outputs video through the mini Display Port, then you will only receive video through your HDMI display.