Give your hand a healthy break. Upgrade to ergonomist-approved comfort and premium cursor control with Kensington's Pro Fit Ergo Vertical Wired Trackball. A 60° tilt angle promotes proper wrist, arm, and shoulder alignment to maximize comfort and...
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzes reviews to verify trustworthiness.