Logitech Unifying Receiver for Connecting Multiple Devices
Replacement Unifying Receiver for Logitech Wireless Mouse M510 Sh | eBay
Logitech Unifying Receiver USB Dongle for Logitech M185 Wireless Mouse and Keyboard : Electronics
New Usb Receiver Wireless Dongle Receiver Usb Adapter For Logitech Mk270/mk260/mk220/mk345/mk240/m275/m210/m212/m150 Keyboard - Keyboard Mouse Combos - AliExpress
Logitech Wireless USB Nano PC Receiver CU0010 Dongle C-11077 Adapter Non-Unifying 993-001106 - Walmart.com