Dark gray Kensington trackball, a ball-shaped input device for precise operation. - Brand: Kensington - Type: Trackball - Color: Dark Gray - Features: Ball-shaped input device Thank you for viewing. I was using it in a Mac environment, but the operability doesn't suit my habits, so I'm selling it. There are no operational issues, but there are signs of use such as shine and wear, so please be aware of this.