This is a wireless mouse with a trackball that I purchased at a store a few years ago. I used it only once or twice. After that, I stored it in a dark place. I am selling it because I don't have many opportunities to use it. It's in good condition. Operation has been confirmed, and it's ready to use. It comes with a convenient carrying case. - Brand: ELECOM - Model Name: birto M-MT1DR - Accessories: USB receiver, dedicated case - Power: Battery-powered - Connection type: Wireless, USB receiver Although batteries are shown in the photos, for safety reasons, I will not include the batteries when shipping. Please note that the box and instruction manual are not included. *Please refrain from purchasing if you are sensitive to used items or items stored at home. If you have any questions, please ask in the comments before purchasing. Thank you.