The Califone X - keys L - Trac USB Laser Trackball is designed for smooth and effortless navigation. Featuring advanced laser navigation technology, this trackball provides a large, high - density ball that allows for precise cursor control without the need for side - to - side arm movements. It includes adjustable resolution settings of 1600, 800, and 400 dpi, making it versatile for various tasks. The ergonomic design accommodates both left and right - handed users and fits hands of all sizes, making it an excellent choice for individuals with disabilities or physical limitations. The trackball is equipped with three buttons, a scroll wheel, and two input jacks for external buttons, ensuring a customizable experience. Its durable ABS molded body ensures longevity, while the wired USB interface guarantees a reliable connection.