The Kensington K64325 Expert Professional Trackball Optical Technology Mouse is a sleek black mouse with 4 programmable buttons and ergonomic design for comfortable use. It features optical tracking method and wired USB connectivity. This trackball mouse by Kensington is reliable and high-quality, making it an excellent choice for professionals looking for precision and control in their computer work. Made in Malaysia, this mouse is easy to use and ideal for those who prefer a trackball style pointer for their computing needs.