KlipXtreme Ergoball Wireless Trackball Mouse/ 7 Button

This wireless trackball mouse combines maximum comfort with total cursor control. Its ergonomic design lets you rest your palm entirely over the mouse avoiding repetitive strain injury. It features a sculpted and stable trackball with 5 levels of DPI resolution, which increases cursor?s precision significantly with only the roll of your thumb. Get ready to work with all-day support and reliability by plugging its tiny USB receiver into your laptop or tablet to enjoy 30 feet of wireless range.