Kensington Orbit Wireless Trackball with Scroll Ring - Black-Red (K70990WW),

Dual wireless connectivity offers the flexibility of 2.4 GHz and Bluetooth LE, with 128-bit AES government-grade encryption security The scroll ring lets you spin the dial to move up and down web pages or documents with complete ease. And the 40mm ball’s hard surface is specially designed as a perfect sphere for precise tracking and control Four DPI settings let you easily adjust the cursor speed to fit your needs by selecting the appropriate level (400, 800, 1,200, or 1,600) - lower DPI for precision editing, and higher DPI for word processing or casual browsing Ambidextrous design works equally well for right-handed and left-handed users. Trackball reduces wrist and hand movement to ease repetitive-stress injuries Free *KensingtonWorks downloadable software provides a personalized experience, giving you the ability to assign a variety of functions (including shortcuts) to the buttons, and adjust cursor and scrolling speed. *Windows ARM-based computers are currently not supported. Please check back for future updates on compatibility