Kensington Pro Fit Wireless Vertical Trackball

It can connect to up to three computers, one using the 2.4 GHz USB Type-A dongle that stows inside the trackball's body and two via Bluetooth, allowing you to smoothly switch between devices. The nine programmable buttons, in addition to multiple scrolling and pointer settings, are customized using the KensingtonWorks software utility.

You can also change between three dpi settings using a single switch to quickly adjust the sensor's speed and sensitivity to different tasks. The right-handed trackball is rated to operate for up to 18-months using two AA batteries, and its 35mm trackball ejects at the push of a button for easy cleaning, helping to ensure that it remains responsive and accurate. This device works with both Windows and MacOS systems.

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