The UltraAV Mini DisplayPort to HDMI (High-Definition Multimedia Interface) adapter enables the connection of your DisplayPort supported computer to an HDMI supported television, monitor or projector. Simply connect the Mini DisplayPort (male) end of the connector to your computer and plug your existing HDMI cable from the display into the HDMI (female) adapter. Setup is complete; no software to install. The circuitry built-into the adapter seamlessly converts the Mini DisplayPort's A/V signal into an HDMI A/V signal and requires no external power.
Customer Reviews of Accell UltraAV B086B-002B Audio/Video Cable Adapter - 10" - Mini DisplayPort Male Digital Audio/Video - HDMI Female Digital Audio/Video
One thing to remember is do you need active or passive. I didn't notice if the description of this product explained that this is an active adapter or not, but it is. Hence why it's more expensive. These are meant for AMD's eye-finity technology. For other simple devices such as Mac's display port, passive will suffice.