The Mac-VGA Adapter supports the use of Macs and PowerPCs with VGA, SVGA, and MultiSync monitors at resolutions from 640x840 to 1152x870. Simply plug the unit into your Macs DB15 video port and then attach a VGA monitor into the Adapters output. Now its easy to use an economical, high-performance VGA/SVGA monitor with your Macintosh.