Sanwa Supply 2.4GHz Wireless Trackball Mouse Model Number: 400-MA073BK ■ Body Size: Approximately W95 x D126.5 x H44mm ■ Weight: Approximately 140g (without batteries) The receiver is already attached to the bottom of the mouse. When using, remove the receiver and connect it to your PC's USB port. It is in relatively good condition, but there may be minor scratches. There are no noticeable scratches. Please see the images. The original box is included, but it will be folded for shipping. Please note that the instruction manual is not included. The instruction manual and drivers can be obtained from the following website: https://direct.sanwa.co.jp/ItemPage/400-MA073BK?wand=link_banner_function_setting