Kensington Orbit Wireless Trackball with Scroll Ring, Professional Computer Mouse with Bluetooth, (2.4GHz Wireless), Optical Tracking & AES Encryption Security, Left or Right Handed - Black (K70992WW) : Amazon.co.uk: Computers & Accessories
Trackball Mouse Finger vs Thumb control Kensington Trackball vs Logitech M570 - YouTube
Logitech M570 Wireless vs Kensington Orbit Trackball Mouse detailed comparison as of 2023 - Slant