The adapter seamlessly connect Mac Book, Mac Book Pro, or Mac Book Air with a Mini displayPort to high definition displays. Support HDMI, DVI or VGA input port,You can connect the display to one of HDMI/DVI/VGA output ports.with the max resolution of 1920x1080p@60Hz, 225MHz/2.25Gbps per channel (6.75Gbps all channel), 12bit per channel (36bit all channel) deep color. Support audio output: When connecting the iMac (Late 2009) and MacBook Pro (Mid 2010) to HDMI display, please set “Sound” on the dialog box of“System Preferences” to get audio output. Only one of the 3 outputs could be used at a time, you cannot use all of them simultaneousely. Automatic detect the display by plugging and unplugging it. Powered from Mini DisplayPort source.