Logitech MX Ergo Wireless Trackball Mouse Graphite (910-005179)

No need to move your hand to move the cursor, you can reduce movement and increase performance. The trackball causes 20% less muscle fatigue in the hand, wrist and forearm than a regular mouse. In addition, the unique adjustable tilt of the MX ERGO allows you to choose an angle of 0 or 20° and immediately improve the posture of the hand and forearm. Drive through your workday with greater comfort, ease and focus on the task at hand.
Work comfortably - even in limited home space. The hand-formed shape of the MX ERGO provides full palm support, while the soft rubber provides a comfortable grip.