The Alps Glidepoint Touchpad for Macintosh Port Connector ADB 100851-00 is a high-quality touchpad designed for Macintosh computers. It features a reliable mechanical tracking method with three buttons for programmable functions. With a maximum DPI of 400, this touchpad offers precise and smooth cursor movement. Made by Alps, a trusted brand known for its precision and reliability, this touchpad is a great choice for those looking for a durable and versatile pointing device for their Macintosh system.