Don't be fooled by the small size of this dynamic powerhouse of input technology. The MicroTRAC contains all of the features of a full sized, three button trackball. Designed to easily accommodate both right and left-hand users, as well as different size hands. You'll enjoy this trackball's ability to dynamically accelerate across the screen as the ball is turned. The ergonomic design works as well on the desktop as is does in your hand. The special "Ambidextrous Trackball" feature allows switching from left to right-handed use without changing your system settings.??All MaxTRAC trackballs come complete with Maxyz software for added functionality. Over 20 features let you enhance your cursor and add functions such as screen wrap. Use OmniSCROLL feature to scroll in any direction on the screen, even diagonally, making viewing large web pages or spreadsheets simple.