The input for the IB-AC539 is Mini DisplayPort and the adapter outputs the video signal via VGA with a resolution of up to 1920x1080@60 Hz. This enables you to use older screens, projectors or even TV on your Mini DisplayPort.
When you old VGA screen or projector does not find the right interface on the computer or laptop, the IB-AC539 comes to the rescue. It adapts a Mini-DisplayPort and convert it to a VGA connection.
The input is given by a mini DisplayPort. Especially common on a MacBook Air®, this connection has been established because Apple has designed it. Anyone who has such a MacBook could benefit from this adapter thoroughly.
VGA is the most common interface among older screens and projectors. If you travel a lot with a portable device in the business sector you will surely find this adapter necessary.