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Logitech MX ERGO Wireless Trackball: Amazon.co.uk: Computers & Accessories
60 Days With The MX ERGO - Long Term Review
Logitech MX ERGO Advanced Wireless Trackball Mouse
my Logitech Ergo palm area got kinda rough, dark spots and disgusting from sweat and long use. fixed with PU nubuck sticker skin from Taobao. highly recommended : r/Trackballs