Kensington Technology Group today introduced its 7th generation Expert Mouse trackball, with new features that provide unrivaled comfort, control and precision, notes the press release. High-end features of the new Expert Mouse trackball include the latest execution of Kensington’s Scroll Ring feature, which circles the ball to provide precise scrolling functionality right at your fingertips. Cursor accuracy and control come from Kensington’s DiamondEye Optical Technology and the large, high-density Expert Mouse ball, which allows a smooth, solid and effortless feel. The Expert Mouse trackball, which is available immediately (pricing varies from dealer to dealer — see Kensington’s Web site), requires Mac OS X or later and comes with a 5-year warranty.