The Microsoft X05-87475 Trackball Optical 1.0 USB Wired Mouse is a right-handed, ergonomic mouse that features optical tracking for precise navigation. With a sleek gray color and a comfortable design, this mouse is perfect for those who prefer a trackball for their computer navigation needs. The mouse has 5 buttons and is connected via USB, making it easy to use and set up on a variety of devices. Its Chinese manufacture ensures quality and reliability, while its Microsoft brand guarantees a trusted experience.