Promotek iBank® 2.4GHz Rechargeable Wireless Mouse

400mAh Rechargeable Battery is Built-in. Charging 1 hour to work for 2880 hours. 2.4GHz wireless connectivity. Fast scrolling: Fly through long documents and Web pages with a single spin. Or use click-to-click scrolling for the precision you need when navigating lists, slides, and images. You get the reliability of a cord plus cordless convenience and freedom.