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 MX Ergo Review: A Worthy Heir to Logitech's Lengthy Trackball Mouse Lineage – Review Geek
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
found a TrackMan Marble FX + questions about sample / polling rate : r/Trackballs