Mouse - Universal - Wireless Ergonomic Rechargeable Vertical Mouse Highlights Universal Wireless Ergonomic Rechargeable Vertical Mouse Wireless Ergonomic Rechargeable Vertical Mouse Product is shipped according to the color or size of the main product page image . Ergonomic Design: This mouse is designed for users to reduce muscle strain and can even undo the damage that years of traditional computer use cause. Wrist pain, shoulder fatigue, wrist syndrome c carpal and tendonitis can all be lessened or, in many cases, eliminated with regular use. Adjustable DPI: Adjustable DPI settings allow you to change the mouse pointer speed sensitivity (800/1200/1600/2400), allowing you to decrease the speed of tasks that require guaranteed precision or increase the speed more quickly for navigation.To re-purchase compatibility scale batteries: IBM or compatible computer.Windows2000/ME/XPX64/VISTA/7/8, Mac OS Xover V10.4an Available USB Port