This is a Sanwa Supply wireless ergonomic trackball mouse. The model number is MA-WTB178BK. It comes with a USB receiver and instruction manual. The USB receiver will be attached under the battery compartment on the back of the main unit for shipping. I will clean it as much as possible before shipping, but please understand that this is a used item, and the product box may be torn. ◆ For environmental conservation, recycled materials may be used for packaging. ◆ The shipping method may be changed without notice, as long as it is an anonymous delivery.