It is smaller than the Mini-DVI port used by other contemporaneous Mac models.
To use the port for displaying video on a standard monitor or television, an adapter must be used.
A Micro-DVI to Video adapter, which provided composite and S-video outputs, was also sold separately.
Additionally, the Asus U2E subnotebook includes a "Micro-DVI" port,[1] which unlike the Apple version has the same form factor as HDMI.
Although it is electrically compatible with HDMI, it does not provide audio output.