Re-Program your keyboard & mouse receiver with Logitech Connection Utility - YouTube
Logitech MK270 Reliable Wireless Keyboard and Mouse Combo
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1pc New Usb Receiver Wireless Dongle Receiver Usb Adapter For Logitech Mk270/mk260/mk220/mk345/mk240/m275/m210/m212/m150 Mouse - Mice & Keyboards Accessories - AliExpress