The Logitech T-BC21 Trackman Trackball USB Mouse is a wired mouse with a unique trackball design, allowing for precise and smooth cursor movement. This mouse features programmable buttons, ergonomic design, and a maximum DPI of 300. The gray color adds a sleek and stylish touch to any computer setup. Made by Logitech, a trusted brand in computer peripherals, this trackball mouse is a reliable and efficient option for users looking for a comfortable and easy-to-use mouse.