Logitech Unifying Receiver for Connecting Multiple Devices
What is Unifying? - Logitech
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 MX Keys Mini Wireless Keyboard & Logi Bolt USB Receiver
Wireless Dongle Receiver Unifying USB Adapter for logitech Mouse Keyboard Connect 6 Device for MX M905 M950 M505 M510 M525 Etc|Mice| - AliExpress
K270 Wireless Keyboard by Logitech® LOG920003051 | OnTimeSupplies.com
Wireless Dongle Receiver 6 Device USB Adapter for Logitech Mouse Keyboard Connect 6 Device for MX M905 M950 M505 M510 M525 Etc|AC/DC Adapters| - AliExpress