Dell Premier Rechargeable Mouse MS900, this premium mouse was designed with a surreal level of detail to be extremely comfortable and easy to use thanks to its sculpted curves, innovative scroll wheel and powerful battery. Premier Rechargeable Mouse MS900 in Graphite The ultra-smooth gliding feet create a smooth and silent glide as you move the mouse for a more satisfying user experience. A horizontal scroll wheel at your thumb allows for intuitive left-to-right navigation, while the vertical scroll atop the mouse grants fast scrolling through long documents and web pages or notched scrolling for precision. The contoured design of the mouse fits the shape of your hand for a comfortable palm grip to help you work efficiently and stay comfortable.