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 Unifying Receiver for Connecting Multiple Devices
Logitech K520 Wireless Keyboard Unifying (NO USB RECEIVER) 97855066718 | eBay
Logitech Unifying Receiver for Connecting Multiple Devices
Logitech K520 Wireless Keyboard 820-002864 Black w/ USB Receiver | SidelineSwap
Logitech K520 Wireless Keyboard Unifying (NO USB RECEIVER DONGLE) 97855066718 | 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
Logitech USB Unifying Receiver 58 H x 38 W x 14 D Black 910 005235 - Office Depot
Logitech K520 Wireless Keyboard User Manual
Amazon.com: Logitech USB Unifying Receiver - 2 Pack : Electronics