Keyboard with built in 51mm Large Trackball with three buttons. Oversized trackball is ergonomically sound, and keyboard utilizes renowned Cherry mechanical key switches with extreme reliability and duty cycle ratings.

Built-in large size(51mm) Trackball for pointing and software-scrolling, adjustable tilt mechanism, located on the bottom of the keyboard. Scroll-In-Mouse Program bundled. N-key-roll-over, reliable mechanical click key switch; 20,000,000 life cycles per switch, gives you the feel of the old IBM keyboard. Single cable with Dual-Head PS2 Connectors for Keyboard and Mouse. Available in Beige or Black.