Thank you for viewing. This is the ELECOM HUGE large-ball wireless trackball, model M-HT1DRBK. The contents include the main unit, the dongle, and the instruction manual. The dongle is attached to the back of the main unit. Please check the condition of the exterior in the photos. There is no wear on the trackball, and the condition is very good. The operation is problem-free. It is in a condition that allows for comfortable use. Please note that it does not support Bluetooth.