The mdp2hdmiusba mini displayport with usb audio to hdmi adaptor offers a cost effective hdmi with audio to mini displayport link letting you connect an hdmi capable hdtv to a device with a mini displayport output while saving the expense of upgrading the tv for compatibility simply plug in the usb and mini displayport connectors to a pc or mac and the hdmi connector to an hdmi televisionmonitor 2 channel analog audio will pass through to the hdmi connection delivering sound to the display side