Logitech Wireless Mouse Trackball M575S Bluetooth Unifying 5 Buttons Purchased March 2021 Used only a few times as the trackball didn't suit me. Used item, so there may be minor scratches. No box, no instruction manual. The angled scroll wheel holds your finger in a more natural and comfortable position. It fits naturally in a wide range of hand sizes. Ball control is smoother and more precise, with 2000 DPI tracking. You can control the mouse as you intend, without misoperation. It supports both Logitech's proprietary Unifying USB and Bluetooth connections. Advanced 2.4GHz technology provides a connection range of up to 10m and a stable connection that is less likely to be interrupted even in crowded wireless environments. Compatible with Logicool Options (free software), allowing you to customize button operations to your liking. Recycled plastic is used for the main body, considering the environment. The mouse also boasts a long battery life of up to 24 months when using Unifying USB and up to 20 months when using Bluetooth. This mouse is ideal for use in the office as well as for working from home. - Model: M575S - Connection method: Wireless - Trackball: Blue - USB receiver: Included - Design: Right-handed