The Microsoft Trackball Optical 1.0 mouse is a USB compatible trackball mouse designed for right-handed users. It features an ergonomic design in a sleek gray color, making it a comfortable and efficient choice for navigating on your computer. With optical tracking technology and 5 buttons, this mouse offers precise and smooth cursor control for a seamless user experience. Whether you're a fan of trackball mice or looking for a reliable and affordable option, this Microsoft mouse is a great choice.