This vintage Mouse Plus trackball is a great addition to any computer setup! With its opto-mechanical tracking method, it's perfect for precise movements for graphic design or gaming. The PS/2 connectivity makes it easy to plug and play with older computers, and it's compatible with Windows 98 and NT. The Mouse Plus MP-400P can reach a range of 400-4000DPI, making it versatile for any task. Get your hands on this unique piece of computer history today!