Roller II Joystick

These trackballs and joysticks are solidly built with removable finger covers and recessed function buttons. The joysticks are 3 inches in length and the trackballs are similar in size and weight to a billiard ball.
 
All units are direct mouse replacements for both Macintosh and Windows. The cursor speed can be changed easily. Each unit includes a drag switch to enable users to use one hand to move items or specify blocks by dragging without having to hold down a button. The joystick models come with three optional handles: standard (as pictured), T-bar and SoftKnob.

The Roller II models include:

• three buttons (left click, right click and drag). 
• three jacks (left click, right click and drag).