This Logitech TrackMan Wheel Ball Mouse is a great addition to any computer setup. With its silver color and sleek design, it's sure to match any aesthetic. It has a tracking method of optical and a maximum DPI of 1000, making it precise and easy to use. The mouse has two buttons and a scroll wheel, as well as features such as connectivity via USB and compatibility with various operating systems. It's a unit that's made in China, comes without a manufacturer warranty but is in very good condition. It's perfect for those who need a reliable and functional trackball mouse.