The Logitech TrackMan Marble Corded Trackball Mouse T-BC21 is a versatile and reliable mouse designed for comfort and precision. With a maximum DPI of 300 and side-to-side scrolling capabilities, this trackball mouse offers a unique and efficient way to navigate on your computer. Available in red, gray, or white, this Logitech mouse is designed with a trackball for smooth and accurate tracking, making it an excellent choice for those who prefer a trackball mouse over a traditional optical mouse. It connects via a wired connection, either through PS/2 or USB, ensuring a stable and consistent connection for your computing needs.