Amazon.com: Logitech 920003051 K270 Wireless Keyboard, USB Unifying Receiver, Black : Electronics
Logitech Unifying Receiver for Connecting Multiple Devices
Logitech MK335 Wireless Keyboard and Mouse - BJs Wholesale Club
Amazon.com: Logitech USB Unifying Receiver - 2 Pack For Personal Computer : Electronics
New Usb Receiver Wireless Dongle Receiver Usb Adapter For Logitech Mk270/mk260/mk220/mk345/mk240/m275/m210/m212/m150 Mouse Keybo - Mice & Keyboards Accessories - AliExpress
Unifying Receiver Wireless USB Dongle For Logitech PC Mouse keyboard 993-000439 – I.E.T. INDUSTRIAL ANTONIO PRIETO – SINCELEJO, SUCRE
List of Logitech products - Wikipedia
Pairing A Logitech MK270 Keyboard And Mouse To A Non Unifying Receiver. – wherethingsareborn
Logitech MK270 Reliable Wireless Keyboard and Mouse Combo