The Traxsys Roller II USB Trackball Mouse is a fully cleaned, tested, and working unit that offers a unique alternative to traditional mice. With its ergonomic design and three buttons, this trackball mouse provides a comfortable and efficient user experience. Made in China, this USB-connected mouse is ideal for those looking for a reliable and high-quality input device for their computers or laptops. The Traxsys Roller II combines functionality with sleek design, making it a practical choice for users who prefer a trackball over a conventional mouse.