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Advanced thumb control: The MX Ergo S Advanced wireless trackball mouse gives ... Advanced thumb control: The MX Ergo S Advanced wireless trackball mouse gives more control with less movement; switch between speed and high-precision tracking at the tap of a button more

Experience MX Ergo S Plus advanced wireless trackball user-tested and certifie... Experience MX Ergo S Plus advanced wireless trackball user-tested and certified by ergonomists with a 20-degree tilt angle for 27% less muscle strain in your forearm(1) and more comfort throughout your day. With no need to move the hand around to... more

Features : Ergonomic Design with Smooth Thumb Control: Move your cursor by the... Features : Ergonomic Design with Smooth Thumb Control: Move your cursor by the smooth trackball instead of moving your wrist and arm. Let the easy and smooth thumb control help you reduce your muscle stress. The optimal angle of the trackball mouse... more

Thumb Operated Trackball Alleviates muscular fatigue in the wrist and arm. No ... Thumb Operated Trackball Alleviates muscular fatigue in the wrist and arm. No Space Limitation Works on any surface without moving the mouse Fult Palm support The broader shape provides full palm support .promoting finger and arm relaxation... more

[Pre Order - allow extra time] Kensington Pro Fit Ergo TB550 Trackball Mouse (... [Pre Order - allow extra time] Kensington Pro Fit Ergo TB550 Trackball Mouse (White) 2.4 GHz RF & Bluetooth LE Connectivity, 1600 dpi Optical Sensor, Seven Programmable Buttons, 4D Scroll Wheel, 34mm Trackball, 45° Tilt, Up to Four Months of Battery... more