Good condition but trackball is missing, as seen in photos.

The T-BC21 Logitech Trackman Marble Mouse is a gray wired trackball mouse with optical tracking method and ergonomic design. This mouse, made by Logitech, features a thumb button for added functionality and has 4 buttons in total. It is designed for convenience and precise control, making it a reliable option for those who prefer a trackball mouse for their computing needs. Made in China, this mouse offers a unique and efficient way of navigating on a computer with its trackball and wired USB connectivity.