Wireless Trackball, Comfortable Ergonomic Design - Product Contents ① Logitech MX Ergo S Used for 2 hours, in excellent condition □ About the product This is the classic Logitech trackball, the MX Ergo S. It has the technical conformity mark. It was recognized normally by Logi Options+ and was working without any problems. It features comfortable operation and multi-function buttons. You can customize the buttons, making it Logitech's top-of-the-line trackball. I used it a few times, but the mouse was too big for me, so I'm selling it. - Model Name: MX ERGO S - Brand: logicool - Type: Wireless Trackball - Compatibility: Windows, macOS, Linux, ChromeOS, iPadOS, Android - Connection Method: Bluetooth, logi bolt - Ergonomic Design: 20° tilt - Environmental Consideration: Made with 20% recycled plastic - Number of Buttons: 5 Thank you for viewing.