The Kensington Amofferextrous Orbit Scroll Wheel USB Trackball with Scroll Ring Mouse is a unique and ergonomic device designed for precise navigation on your computer. With its optical tracking method and two buttons, this trackball offers a smooth and efficient user experience. The black color and sleek design make it a stylish addition to your workspace, while the wired USB connectivity ensures a reliable connection. Whether you are a programmer, graphic designer, or simply looking for a more comfortable mouse option, this trackball is a versatile choice for your computing needs.