Anker Ergonomic Wireless Vertical Mouse helps to reduce strain and pain with a neutral wrist position, no finger contortions, and a reshaped thumb rest for added comfort. Its wireless design frees you from cables, and the optical tracking, scroll wheel, and added next/last page buttons enhance productivity. Adjust DPI levels between 800, 1200, and 1600 DPI for personalized control. With a battery life of up to 18 months, you can power through your tasks without interruptions.