This ergonomic trackball mouse offers comfortable operation. - Brand: Logitech - Type: Trackball - Color: Black - Ball Color: Silver - Number of Buttons: 8 - Scroll Wheel: Yes - Older Model - Tested and working - Accessories: Unifying receiver only. Box and charging cable are not included. - Personal Experience: The adjustable angle of the mouse and the trackball have improved my tenosynovitis. There are scratches and dirt from use. Please refrain from purchasing if you are concerned about these. Thank you for viewing.