The Logitech T-BB14 Trackman Marble Mouse is a USB wired trackball mouse designed for efficient and precise navigation on your computer. With a sleek gray color and a trackball tracking method, this mouse offers a comfortable and intuitive user experience. The mouse has a total of two buttons and is ideal for users who prefer a trackball model for their pointing device. Made by Logitech, a trusted brand in the industry, this mouse is a reliable choice for those looking for a quality trackball mouse for their computing needs.