Amazon.com: New Logitech Unifying USB Receiver for keyboard K230 K250 K270 K320 K340 K350 K750 K800 : Electronics
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
Lenovo 2.4G Wireless USB Receiver | Lenovo US
Logitech K350 Wireless Keyboard, USB Unifying Receiver, Black LOG920001996
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 MK240 Mini Wireless Keyboard and Mouse Combo With Receiver Wireless Keyboard and Mouse Mice Set (Black ) - Newegg.com
Logitech Cordless Mouse & Keyboard Receiver PS/2 & USB C-BG17-DUAL 830680-0000 | eBay
Logitech Unifying Receiver for Connecting Multiple Devices
Logitech Unifying receiver - Wikipedia
Logitech MK540 Advanced Wireless Keyboard and Mouse - Black | Dell USA
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 K270 Wireless Keyboard with Unifying Receiver
Logitech MK520 Wireless Keyboard Mouse Combo with Unifying
Logitech MK235 Durable Wireless Keyboard and Mouse Combo