Logitech MK520 Wireless Keyboard Mouse Combo with Unifying
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
Logitech MK550 Wave Wireless Keyboard and Mouse Combo - Black | Dell USA
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
Logitech USB Unifying Receiver, Black | OfficeSupply.com