The OEM Logitech Trackman Marble Trackball LOG910000806 is a corded optical trackball designed for both right-handed and left-handed users. It features a thumb-controlled design that improves control while reducing hand and wrist motion, providing smooth and ultra-precise tracking. This trackball offers USB and PS/2 connectivity, with an adapter included for versatility. Customize buttons using the included MouseWare software, while the WebWheel software optimizes your web browsing experience. Compatible with PC and Mac, including Windows XP and Windows Vista.