Elecom Trackball Mouse M-RT1BR Connection: Bluetooth Power: AAA batteries x 2 Includes only the mouse body and stand. Requires 2 AAA batteries (sold separately) for use. I didn't notice any problems while using this, but it is a used item, so please refrain from purchasing if you are looking for a perfect product. Shipping: Takkyubin Compact (Yamato Transport's compact delivery service)