Kensington Orbit Wireless Trackball with Scroll Ring, White, K70991WW

Optical tracking technology delivers precise cursor movement for superior accuracy, so you can get where you want on the screen quickly with less hand movement, improving productivity and efficiency. Mac and PC compatible. 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. The scroll ring lets you spin the dial to move up and down web pages or documents with complete ease. And the 40mm balls 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 & left-handed users. Trackball reduces wrist and hand movement to ease repetitive-stress injuries. A detachable wrist rest delivers soft cushioning to support the hand and wrist in ergonomic comfort for pain-free productivity during extended periods of activity on the computer. Dual wireless connectivity offers the flexibility of 2.4 GHz and Bluetooth (3.0 and LE), with 128-bit AES government-grade encryption security.