Logitech MX ERGO - Trackball - optical - 8 buttons - wireless - Bluetooth, 2.4 GHz - USB wireless receiver - Hunt Office UK
Logitech MX ERGO Advanced Wireless Trackball Mouse
Logitech MX ERGO Review - RTINGS.com
Trackball Mouse Wireless, Ergonomic Rollerball Mouse with RGB Backlit, 2.4G USB and Dual-Bluetooth Connection, Thumb Control Mouse Rechargeable for Windows Mac Android iPad Computer Laptop, Black: Amazon.co.uk: Computers & Accessories
Logitech MX ERGO Advanced Wireless Trackball Mouse