This Mitsumi optical scroll mouse is a reliable and efficient tool for your computing needs. With two buttons and a scroll wheel, it offers easy and smooth navigation through your files and applications. Its PS/2 connectivity ensures a simple and quick setup with most computers. The sleek black color and standard size make it a great addition to any workspace. The tracking method is optical, which means it uses a laser to track your movements for accurate and responsive tracking. The model number is ECM-S6102, and it is manufactured by Mitsumi, a trusted brand in computer accessories.