1. Introduction
This manual provides comprehensive instructions for the Kensington Orbit Trackball Mouse with Scroll Ring, model K72337US. This device is designed to offer precise cursor control and comfortable navigation for various computing tasks. It features optical tracking technology, a unique scroll ring, and an ambidextrous design.
The Kensington Orbit Trackball Mouse is engineered to reduce wrist and hand movement, contributing to ergonomic comfort during extended periods of use.

Image 1.1: Top view of the Kensington Orbit Trackball Mouse with Scroll Ring.
2. Package Contents
Verify that all items are present in the package:
- Kensington Orbit Trackball Mouse with Scroll Ring (K72337US)
- Detachable Wrist Rest
- User Manual (this document)

Image 2.1: The Kensington Orbit Trackball Mouse shown with its detachable wrist rest.
3. Setup Instructions
3.1 Connecting the Trackball
- Locate an available USB port on your computer.
- Plug the USB connector of the trackball into the USB port.
- The operating system will automatically detect and install the necessary drivers.

Image 3.1: The trackball is compatible with Windows and Mac operating systems, connecting via USB.
3.2 Attaching the Wrist Rest
For enhanced ergonomic support, attach the included wrist rest to the front edge of the trackball. Align the wrist rest with the trackball's base and gently press to secure it.

Image 3.2: The detachable wrist rest provides additional comfort and ergonomic positioning.
3.3 Installing KensingtonWorks Software (Optional)
To customize button functions and adjust cursor/scrolling speeds, download and install the KensingtonWorks software from the official Kensington website. This software provides a personalized experience for your trackball.
- Visit KensingtonWorks Software Page.
- Follow the on-screen instructions to download and install the software.
- Once installed, you can access the settings to configure your trackball.
Note: ChromeOS users will receive standard HID functions for the trackball but cannot customize the device through KensingtonWorks software.

Image 3.3: The KensingtonWorks software allows for personalized configuration of the trackball's buttons and sensitivity.
4. Operating Instructions
4.1 Cursor Control with the Trackball
Use your fingertips to roll the blue 40mm trackball to move the cursor on the screen. The optical tracking technology provides precise and smooth cursor movement.

Image 4.1: The trackball utilizes optical tracking for accurate cursor control.
4.2 Using the Scroll Ring
The unique scroll ring encircles the trackball. Rotate the scroll ring with your finger to navigate through web pages and long documents without needing to click or drag scroll bars.

Image 4.2: The scroll ring allows for easy vertical navigation of content.
4.3 Button Functions
The trackball features two programmable buttons. By default, these function as left-click and right-click. With KensingtonWorks software, you can assign various functions to these buttons, such as:
- Standard mouse clicks
- Application-specific shortcuts
- Media controls
- Web navigation (e.g., back/forward)
The ambidextrous design ensures comfortable use for both right-handed and left-handed individuals.
5. Maintenance
5.1 Cleaning the Trackball
Over time, dust and debris can accumulate inside the trackball housing, affecting tracking performance. Regular cleaning is recommended.
- Gently remove the trackball from its housing.
- Clean the blue trackball with mild hand soap and water. Ensure it is completely dry before reinserting.
- Use a soft, lint-free cloth or cotton swab to carefully wipe away any dust or debris from the inside of the trackball housing and the optical sensor.
- Reinsert the trackball into its housing.
Caution: Avoid using harsh chemicals or abrasive cleaners, as these can damage the trackball or its components. Do not use Clorox wipes, as they may leave a sticky residue.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Cursor does not move or moves erratically. |
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| Scroll ring is stiff or unresponsive. |
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| Buttons are not responding or performing incorrect actions. |
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| Discomfort or fatigue during use. |
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7. Specifications
- Brand: Kensington
- Model Number: K72337US
- Connectivity Technology: Wired USB
- Movement Detection Technology: Optical, Trackball
- Color: Black-Blue
- Item Weight: 10.4 ounces (approx. 295 grams)
- Product Dimensions (LxWxH): 2 x 6 x 8 inches (approx. 5.08 x 15.24 x 20.32 cm)
- Hardware Platform: PC
- Operating System Compatibility: Windows (11, 10, 8.1, 8, 7), Mac OS X (10.6 and later)
- Special Feature: Ergonomic Design, Scroll Ring
- Date First Available: October 17, 2009
8. Warranty and Support
For detailed warranty information and technical support, please visit the official Kensington website or contact Kensington customer service.
- Kensington Official Website: www.kensington.com
- Support Page: Refer to the support section on the Kensington website for FAQs, driver downloads, and contact options.





