Belinda 35 2-in-1 Mini Display Port to HDMI VGA Cable Adapter Aluminum Case for Apple MacBook/MacBook Pro/iMac MacBook Air/Mac Mini The HDMI can support audio output for iMac (late 2009) and mac book pro (mid 2010) Support hdmi/dvi/vga output with the max resolution of 1920x1080p@60hz, 225mhz/2.25gbps per channel (6.75gbps all channel) Automatic detect the display by plugging and unplugging it Powered from mini display port source