Amazon.com: Logitech M570 Wireless Trackball Mouse – Ergonomic Design with Sculpted Right-Hand Shape, Compatible with Apple Mac / Microsoft, USB Unifying Receiver, Dark Gray (Discontinued by Manufacturer) : Electronics
Logitech Wireless Trackball M570 : LOG-910-001882 : The Keyboard Company
Logitech Logi M570 Wireless Mouse Trackball for Windows, Mac with Unifying receiver
Logitech Wireless Trackball M570 With Unifying Receiver | Flickr
Amazon.com: Logitech M570 Wireless Trackball Mouse – Ergonomic Design with Sculpted Right-Hand Shape, Compatible with Apple Mac / Microsoft, USB Unifying Receiver, Dark Gray (Discontinued by Manufacturer) : Electronics
How to Pair Logitech M570 Mouse with Non-Unifying Receiver (Windows PC) - YouTube