This is a rare vintage BLACK Apple Desktop Bus Mouse II, model number M2706.An ADB port is required for use, but will also work with Griffin\'s iMate ADB to USB adapter for use with recent Apple systems that have a USB port.Mouse was manufactured in the early 1990s, and sold only with complete Macintosh TV desktop systems in 1993 and 1994. Since this mouse is over 20 years old, with collectible status, they are priced accordingly, and I will not be accepting any returns or processing any refunds after they are purchased.The plastics on this mouse are aging in quality, and may have developed normal wear and tear, and as a result, the mouse is sold as-is.However, I have inspected every detail and there is no aging, cracking or discolouration.Even the cable is in pristine condition.