Ask a Swiss: How to connect a non-Unifying Logitech keyboard & mouse to a new dongle
Logitech Nano Receiver for Mk270 (non-unifying) online kaufen | eBay
New Usb Receiver Wireless Dongle Receiver Usb Adapter For Logitech Mk270/mk260/mk220/mk345/mk240/m275/m210/m212/m150 Mouse - Mice & Keyboards Accessories - AliExpress