Models: T-BB13, T-CH11, M570, MX-Ergo

• ergonomic, trackball, thumb

Takes most of the repetitive movements and strain which the entire hand usually must perform and allocates all the workload to the thumb.
They have contoured bodies that provide relaxing supports for the hand, optical tracking, and convenient scroll and mouse buttons.
TrackMan Product Website
Ergo M575 Product Website
MX Ergo Product Website

Trackman

Ergo

MX Ergo