Pro Fit Ergo TB550 Trackball

The rechargeable Pro Fit Ergo TB550 Trackball from Kensington offers thumb-operated cursor control that eliminates the traditional arm and hand movement required with a traditional mouse. The 45° angled body rotates the hand and forearm away from a prone position to reduce strain on the forearm. Cursor control is via the 34mm trackball which offers silky-smooth movement and adjustable optical tracking from 400-1600 DPI. The contoured body provides a support for the hand, naturally positioning the fingers over the right and left buttons. Vertical and horizontal scrolling function are provided by a tilting scroll wheel that features crisp detents, conveniently positioned between these buttons to complete the traditional mouse control layout. The index finger has easy access to convenient Back and Forward Buttons for browsing through multiple pages of a document or web page.

The Pro Fit Ergo TB550 Trackball offers Dual Connectivity that can simultaneously support connections to up to 3 computers or devices (1 via the included 2.4 GHz receiver and up to 2 more via Bluetooth LE).

As the Pro Fit Ergo TB550 Trackball places cursor control fully upon the thumb, (which on most other trackballs is generally shared by several fingers), anyone who has existing thumb issues would be advised to consider alternative solutions.

• Convenient Back/Forward Control: Dual buttons enable easy movement forward and backward when surfing the Web.
• Tilting Scroll Wheel: Both traditional vertical and horizontal scrolling are supported by the tilting scroll wheel. A "middle click" for access to vertical autoscroll is also available.
• Thumb Cursor Control: Cursor control is accomplished by the thumb, leaving the fingers free to perform clicking and scrolling.
• Dual Connectivity Wireless Convenience: The Pro Fit Ergo TB550 Trackball comes with a standard 2.4 GHz USB receiver and can also support Bluetooth connection to 2 devices.
• Rechargeable Convenience: The TB550 is equipped with a rechargeable battery and includes a USB charging cord. It can continue to operate while in charging mode to ensure no interruptions to work.
• Precision Optical Tracking Technology: With an adjustable sensor that offers settings ranging from 400 - 1600 DPI, each individual can find a level of performance that will meet their work requirements. Changing DPI is done via a button on the underside of the trackball.
• 34 mm Trackball: The 34 mm ball offer smooth and accurate cursor control, with minimal resistance. While the low force required reduces the risk of straining the thumb, individuals should be aware that as with any other device the risk of developing RSI is present.
• Trackball Ejection Button: Most trackballs will require occasional cleaning in order to ensure ongoing optimum performance. The Pro Fit Ergo TB550 Trackball is equipped with a convenient "ejection button" that pops the trackball out for ease of cleaning.
• Natural Hand Support: The contoured body of the trackball is shaped to offer support for most average to moderately large hands. Those with small hands may find it difficult to find a comfortable position and those very large hands might wish to consider a device with a larger supporting surface.
• Multi-Computer Functionality: Those with compatible computer systems can connect to 3 different computers.
• Government Grade Encryption: 128-bit AES Encryption for the 2.4 Ghz receiver.

• Dimensions:
  Height: 1.97" (5.0 cm)
  Depth (front to back): 5.44" (13.8 cm)
  Width: 3.68" (9.3 cm)
  
• Trackball Diameter: 1.34" (34 mm). Ejection button for cleaning.
• DPI Resolution: 400, 800, 1200, & 1600 DPI (adjustment switch on underside)
• Buttons: 7 (programmable via KensingtonWorks software)
• Tilt Angle: 45°
• Scroll Wheel: 4D (supports both vertical and horizontal scrolling)
• Power Source: Rechargeable Battery (non-replaceable)
• Battery Life: Up to 4 months on a full charge
• Interface:
  USB 2.0/3.0 Type A (2.4 GHz Logitech Unifying Receiver included)
  Bluetooth Low Energy (Dual Channels supported) Note: Bluetooth® 3.0 not supported
• Wireless Range: Up to 33' (10 m)
• Encryption: 128-bit AES
• Compatibility:
  Windows 10 and above
  Chrome OS v91 and above
  MacOS 10.14 and above
  iPadOS 16.4.1 and above
• Plug & Play: Basic Mousing Functions
• Programmability: Downloadable software to customize all button functions is available for both Windows and Mac operating systems.
  Note: ChromeOS user can get HID functions for a trackball but will not be able to customize their device through KensingtonWorks
  
  
• Colour: Steel Grey with Silver Grey ball
  
  
• Warranty: 3 year limited. Manufacturer direct only.
• Package Contents: Pro Fit Ergo TB550 Trackball, 2.4 GHz Wireless Receiver, USB Charging Cord, User Documentation

• Since all cursor movement is accomplished by the thumb you should be vigilant and take notice if any pain begins to develop. Should this occur it would be wise to immediately reduce the usage or change to a device that does not require thumb movement. Most people are quite aware of carpal tunnel and often shift to trackballs as an alternative to address existing RSI issues or as a precautionary measure. However, most are not aware of the danger which can exist from overuse of the thumb. De Quervain Syndrome or De Quervain's Tenosynovitis can be as painful and debilitating as the other more commonly known RSI.
  Learn more about De Quervain's Tenosynovitis.
• If you are new to a trackball expect that it will take a while to get accustomed to the different style of control. It is also a good idea to limit the amount of time you use it in the first while. Rather, build up to longer periods of usage by interchanging with a different mousing device or by Load Balancing (see next point).
• Load Balance Your Use: Since the Pro Fit Ergo TB550 Trackball is a dedicated right hand mousing device it cannot be switched between hands. For this reason it is a good idea to have an alternate mousing device either for either the left or right hand which can be used to give the thumb a break from continuous usage.
• Take regular breaks. If you find that you are experiencing discomfort in your thumb, especially in the learning stages - that is a good sign that you may want to take a break by switching to a different device or by swapping to the other hand. As with any device, make an effort to regularly change your usage, take breaks, and perform stretches. Some find that the fingers can benefit from occasionally flexing them through a full range of movement, both extending and contracting them fully.