Logitech MK540 Advanced Wireless Mouse and Keyboard 920-008671
Logitech MK540 review: the most coffee-proof mouse and keyboard combo? - The Big Tech Question
Logitech Mk540 Wireless Keyboard Mouse Combos With Unifying Usb Receiver Mice Keys Set For Pc Laptop Office Business Game - Keyboard Mouse Combos - AliExpress
Logitech MK540 Advanced wireless keyboard and mouse review: Snappy typing, no noise | PCWorld