Logitech Unifying Receiver for Connecting Multiple Devices
SOLVED] Logitech K520 keyboard not working | Quickly & Easily! - Driver Easy
Amazon.com: Logitech C-U0007 Unifying Receiver for Mouse and Keyboard Works with Any Logitech Product That Display The Unifying Logo (Orange Star, Connects up to 6 Devices) : Electronics
Logitech Unifying Receiver for Connecting Multiple Devices