Logitech ERGO M575 Wireless Trackball Mouse - Easy thumb control, precision and smooth tracking, ergonomic comfort design, for Windows, PC and Mac with Bluetooth and USB capabilities - Graphite - Newegg.com
Logitech MX Ergo Wireless Trackball Mouse Adjustable Ergonomic Design, Control and Move Text/Images/Files Between 2 Windows and Apple Mac Computers (Bluetooth or USB), Rechargeable, Graphite - Black
Logitech M570 Trackball Review
Logitech ERGO M575 Wireless Trackball, Graphite - Walmart.com
Logitech M570 Wireless Trackball Mouse – Ergonomic Design with Sculpted Right-Hand Shape, Compatible with Apple Mac /