Introducing the Kensington Mouse Trackball Orbit M01047, a smooth scrolling ergonomic device that will change the way you navigate on your computer. With its optical tracking method, you can expect accurate and precise movements without the need for a mousepad. The 4-button trackball has a maximum DPI of 1000 and features a scroll ring for easy scrolling.This unit is black in color and measures 4 inches in length, width, and height. It is a wired device that connects to your computer, making it a reliable and secure option for your daily use. Get your hands on this high-quality unit today!