ELECOM EX-G Left Handed Trackball Mouse, 2.4 GHz USB Wireless, Ergonomic, Thumb Control, Tracking Roller Ball, 6 Programmable Buttons, Tilt Scroll

Customers find the trackball mouse to be a good quality left-handed device with 7 buttons and wheel functions, and appreciate its ergonomic design that decreases hand and wrist strain. The functionality, smoothness, accuracy, and ease of use receive mixed feedback - while some say it works well and moves smoothly, others report it barely works and has choppy movement.