Logitech trackball mouse, black, with gray ball - Brand: Logitech - Model: Trackball Mouse - Color: Black - Accessories: Ball (blue) - Condition: Used, no noticeable scratches Thank you for viewing. The receiver's operation has not been confirmed, as it was used with Bluetooth. Purchased about 2 years ago, used for less than a year. I am selling it because I am no longer using it.