idea: Now the ball does it all. Your computing experience just got smoother, faster and easier with the Kensington SlimBlade™ Trackball. Choose navigation mode to control cursor and scrolling. Media mode controls volume, play/pause, stop, and track forward/backward, while view mode zooms in/out, and pans. And it does it all with the ball to put complete control at your fingertips.
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Kensington K72327US Kensington K72327US mouse USB Type-A Trackball