The Elecom Hard Trackball Case is designed specifically for the EX-G Wireless Trackball Mouse Series, providing a durable and protective housing for the trackball mouse. The sleek black color adds a touch of style to the overall aesthetics of the mouse. With wireless connectivity technology, users can enjoy the freedom of movement without being restricted by cords or cables. The special feature of the trackball technology allows for precise and accurate cursor movement, making it a practical and efficient choice for users looking for a reliable and high-quality mouse.