Logitech MX ERGO Plus Wireless Trackball Mouse with Ergonomic design Graphite 910-005178 - Best Buy
Amazon.com: Logitech M570 Wireless Trackball Mouse – Ergonomic Design with Sculpted Right-Hand Shape, Compatible with Apple Mac / Microsoft, USB Unifying Receiver, Dark Gray (Discontinued by Manufacturer) : Electronics
Logitech MX ERGO Advanced Wireless Trackball with Tilt Plate
This Trackball Mouse Has an 18-Month Battery Life
Amazon.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 : Electronics
Logitech's new $50 ergonomic trackball mouse has Bluetooth LE support | Engadget