User manual Logitech Wireless Trackball M570 (English - 2 pages)
Logitech M570 Mouse Not Working - Fix - YouTube
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 M570 Wireless Trackball Mouse With USB Dongle | eBay