Logitech Unifying Receiver for Connecting Multiple Devices
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
Refurbished and Used Hardware | Logitech MK570 Comfort Wave Wireless Keyboard & Laser Mouse Combo w/USB Unifying Nano Receiver (Black/Gray) - B
Logitech K360 Compact Wireless Keyboard for Windows, 2.4GHz Wireless, USB Unifying Receiver, 12 F-Keys, 3-Year Battery Life, Compatible with PC, Laptop (Glossy Black) - Wireless Connectivity - RF - 33 ft -