Amazon.com: Logitech 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
Amazon.com: Logitech 920003051 K270 Wireless Keyboard, USB Unifying Receiver, Black : Electronics
Logitech Cordless Mouse & Keyboard Receiver PS/2 & USB C-BG17-DUAL 830680-0000 | eBay
New Unifying Wireless USB Receiver for Logitech Keyboard K250 K270 K320 K340 K350 K750 K800 N305 MK520 MK550 MK710
Logitech MX Keys Mini Wireless Keyboard & Logi Bolt USB Receiver
Amazon.com: Green Keyboard and Mouse Wireless, Vivefox Teal Wireless Keyboard with Phone Holder USB A & Type C Receiver Mint Keyboard and Mouse Compatible for Windows, Mac, MacBook/Air/Pro Computer : Electronics
Amazon.com: Logitech Wireless Keyboard and Wireless Mouse Combo with NEW Unifiying Receiver Technology and Long-Range 2.4 GHz Connection, Multimedia Hot Keys, Extended Battery Life : Electronics
Amazon.com: Logitech 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