Logitech Unifying Receiver for Connecting Multiple Devices
Logitech C-BS35 replacement wireless dongle receiver only | eBay
Replacement Unifying Receiver for Logitech Wireless All-in-One Keyboard TK820 Sh | eBay
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: Original Logitech USB Replacement Receiver for Logitech Wireless Headset H760 : Electronics
Usb Receiver Wireless Dongle Adapter for Logitech G PRO G903 G403 Mouse Adapter - Walmart.com
USB Unifying Receiver by Logitech® LOG910005235 | OnTimeSupplies.com