Perixx PERIMICE-717 Wireless Ergonomic Trackball Mouse Programmable 400/1000 DPI - The ICT University
Amazon.com: Perixx Periboard-322 Wired Mechanical Trackball Keyboard with 2 Hubs, 2.17 Inch Large Trackball, RGB Backlit Design, US English Layout (PB-322BUS-11577) : Electronics
Perixx Periboard-322 - Wired Backlit 55mm Trackball Black USB Computer Keyboard with 2 USB Hubs - Walmart.com