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 USB Unifying Receiver Dongle for Mouse & Keyboard(100 Pack) | eBay
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
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 USB Receiver for Logitech Wireless G533 Gaming Headset
Logitech Unifying Receiver 1 to 6 Devices USB Dongle for Wireless Keyboard Mouse for sale online | eBay
Original Replacement USB Receiver for Logitech Wireless Presenter R400 and R800