Models: K72327US, M01082, K64327, K64325

• ergonomic, trackball, ambidextrous

The trackball takes up less desk space than what is needed to operate a mouse and is more comfortable during extended use because it requires less arm and wrist movement. Laser technology provides highly accurate and responsive cursor tracking and scrolling, plus the large 55mm ball makes it quicker and easier to navigate anywhere on the screen.
SlimBlade Product Website
Orbit Optical Product Website
Expert Mouse Product Website

Slimblade

Orbit

Expert

Model: CST2545-5W-RC

• ergonomic, ambidextrous, trackball

The L-Trac is one of the most recommended lines due to its high level of quality and workmanship. Made with only the highest quality components and materials, they have a reputation for reliability and performance. The precision-ground ball and mirror-finished rollers deliver ‘smooth-as-silk’ feel and effortless control.
The design is completely ambidextrous, accommodating either right or left-handed users. The extra large ball and contoured profile allow for easier control and accommodates hands of all sizes from children to adults. Hardwired into the trackball is its unique ability to dynamically accelerate across the screen in response to the speed with which you move the trackball.
Product Website

Models: T-BC21

• ergonomic, trackball, ambidextrous

The mouse has a trackball design with a broad palm area and gentle curves for comfort. The trackball supports your right or left hand and stays in place, so you can move the cursor without moving your arm.
Logitech TrackMan Marble Mouse Product Website