SANWA Wired Ergonomic Trackball Mouse, Programmable Roller Ball Mice, Tilt Scroll, 400/800/1200/1600 DPI, Computer trackball & Finger Rest, Compatible with Mac, Windows, Laptop, Chrome OS, Black

TRACKBALL COMFORT - Quipped with a 34mm trackball and 5 buttons, you will not need to mouse around to move the cursor as thumb controlled trackball stays in one place. Not only work on flat surfaces, but also on your leg, sofa and other surfaces as well. A full control of everything is within your fingers.
ERGONOMIC DESIGN - Places your hand in a natural wrist and arm position for smoother movement and less muscle tension. Comfortable finger rests just fit in the palm of your hand. No driver required. The high-quality USB plug and 4.9 ft ( 1.5 m) cable make it easy to use and keep stable. Once you get used to it, you will love it!
THE HIGH-QUALITY MICRO SWITCHES - The switch which affects the operation performance adopts the switch made by well-known manufacturers, which has excellent click feeling, superb operational responsiveness and high durability. It also adopts a laser sensor that allows for more accurate control.
4 ADJUSTABLE DPI LEVELS - You can adjust the mouse among 4 resolutions of 400 / 800 / 1200 / 1600 DPI depending on your needs. When the count switch button is pressed, the DPI is notified by the number of flashes. Comes with Back and Forward buttons that are convenient for browsing the web.
WIDE COMPATIBILITY - Compatible with most system including Windows 10/ 8.1 /8/7, macOS 10.1210. 15, Mac OS X 10.310. 11, Chrome OS.
Notice: All SANWA Products provide the same high quality after-service as in Japan, including a 1-Year Worry-Free Manufacturer Warranty and free lifetime technical support.