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
Logitech ERGO M575 Wireless Trackball with Smooth Tracking
Amazon.com: Logitech New Unifying USB Receiver for Mouse Keyboard M515 M570 M600 N305 MK330 MK520 MK710 MK605 : Electronics
Logitech M570 Wireless Trackball Mouse – Ergonomic Design with Sculpted Right-Hand Shape, Compatible with Apple Mac / Microsoft, USB Unifying Receiver, Dark Gray - TilyExpress Uganda
Logitech Unifying Receiver for Connecting Multiple Devices
What can someone do if they've lost the wireless USB connector to their Logitech keyboard and mouse? - Quora
Refurbished: Logitech Recertified 910-001799 M570 Black 5-button 1-wheel USB RF Wireless Laser Trackball - Newegg.com
LOGITECH ERGO M575 FOR BUSINESS
Logitech M570 Wireless Trackball Mouse Gets 54% Reduction to $27.50, Today Only - TechEBlog
How to Pair Logitech M570 Mouse with Non-Unifying Receiver (Windows PC) - YouTube
Refurbished: Logitech Recertified 910-001799 M570 Black 5-button 1-wheel USB RF Wireless Laser Trackball - Newegg.com