Features: Comfortable design: With or without a mouse pad, the wireless office mouse moves easily for precise optical tracking and includes a handy scroll wheel for fast operation. Thoughtful gifts: You can send the wireless gaming mouse to your families, colleagues and other people who need to work on computers or other electronic equipment, allowing them to work in an easy and efficient way. Specifications: Color: black Size: about 4.33 x 2.56 x 1.5 inches/ 11 x 6.5 x 3.8 cm Package includes: 30 x Lightweight wireless mouse Notes: Please note that the wireless mouse is powered by 1 AA battery, which is not included in the package that you need to prepare it before using. The brands mentioned above are only for purposes of demonstrating compatibility, not as trademarks. Our trademark is Hoteam. Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays.