SOLVED: USB for wireless Logitech keyboard lost. - Logitech Harmony Smart Keyboard - iFixit
Logitech latest Version Genuine Tiny Unifying General Receiver Dongle Connect up to Six Devices for Logitech mouse mice keyboard _ - AliExpress Mobile
User manual Logitech MK235 (English - 120 pages)
New Usb Receiver Wireless Dongle Receiver Usb Adapter For Logitech Mk270/mk260//mk345/mk240/m275/m210/m212 Mouse Keybo - Mice & Keyboards Accessories - AliExpress
What can someone do if they've lost the wireless USB connector to their Logitech keyboard and mouse? - Quora