USB Unifying Receiver For Logi Tech Mouse MK520 MK550 and Keyboard K350 K750 - AliExpress
Logitech K350 Wireless Wave Keyboard with Palm Rest
Amazon.com: SummitLink Unifying Receiver for Mouse and Keyboard Compatible for Any Logitech Product That Display The Unifying Logo (Orange Star, Connects up to 6 Devices) B083J7DYDT : Electronics
Logitech USB Unifying Receiver - Micro Center
Logitech Unifying Receiver for Connecting Multiple Devices
Logitech K350 Wireless Keyboard, USB Unifying Receiver, Black LOG920001996
Amazon.com: New Logitech Unifying USB Receiver for keyboard K230 K250 K270 K320 K340 K350 K750 K800 : Electronics
New Logitech Unifying USB Receiver for keyboard K230 K250 K270 K320 K340 K350 K750 K800 - Walmart.com
Logitech K350 Wireless Wave Keyboard with Palm Rest
USB Unifying Receiver for Logitech Mouse and Keyboard » eSquareParts