Unifying USB Wireless Receiver for Logitech Mice 570 T620 MX master M9 – Magconn
Amazon.com: New Logitech Unifying USB Receiver for Mouse MX M905 M950 M505 M510 M525 M305 M310 M315 M325 M345 M705 M215 : Electronics
Wireless Dongle Receiver Usb Adapter For Unifying Mouse Keyboard - Walmart.com
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) (C-U0007) : Electronics