Actpe Mini DisplayPort Thunderbolt to HDMI DVI VGA Adapter Cable for Apple Mac Book MacBook Pro MacBook Air Mac mini iMac, Surface pro 1 2 3, ThinkPad X1 - 3 in 1 Mini DP to HDTV Converter Cable The HDMI can support audio output for iMac (Late 2009) and Mac Book Pro (Mid 2010) The adapter seamlessly connect Mac Book, Mac Book Pro, or Mac Book Air with a Mini display port to high definition displays Only one of the 3 outputs could be used at a time, you cannot use all of them simultaneously Powered by Mini Display Port connection Automatically detect the display by plugging and unplugging it