Wireless Dongle Receiver Unifying USB Adapter for logitech Mouse Keyboard Connect 6 Device for MX M905 M950 M505 M510 M525 Etc|Mice| - AliExpress
Logitech USB Dongle Extender - Works with Unifying Receiver
Logitech wireless USB dongles vulnerable to new hijacking flaws | ZDNET
Amazon.com: Logitech USB Unifying Receiver, 2.4 GHz Wireless Technology, USB Plug Compatible with all Logitech Unifying Devices like Wireless Mouse and Keyboard, PC / Mac / Laptop - Black : Electronics
Logitech Wireless 2.4Ghz USB NANO Dongle 1 to 1 / 1 to 6 Unifying Receiver | eBay