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Ergonomist-Approved Design - All-day comfort is provided through an ergo design with a 60° tilt and natural handshake position to improve wrist and forearm position Easy to Use - Uses the same left click right click and scroll wheel operation as a traditional mouse while providing the advantages of a trackball with a simple roll of the thumb Premium Precision & Speed - The high-quality optical tracking sensor 34mm thumb-operated trackball and triple DPI switch provide smooth cursor control optimal precision and easy cursor speed transitions Flexible Wireless Connection Options - Connect your vertical trackball to up to 3 different devices - one via the 2 4GHz nano dongle that stows inside the trackball body and two additional connections via Bluetooth Plug & Play or Customize - Experience plug and play default settings or use KensingtonWorks software to set pointer and scrolling options and professionally customize 9 programmable buttons to tackle common tasks with one touch
