The Logitech T-CL13 PS/2 Trackman Marble+ Classic Mouse is a white trackball mouse with a 2-button design and scroll wheel. It offers an ergonomic design for comfortable use and features a trackball for precise cursor movement. With connectivity via PS/2 and infrared interface, this mouse is perfect for those who prefer a trackball over a traditional mouse for their computing needs. The Logitech brand ensures quality and reliability in this classic trackball mouse.