The X-Keys L-Trac Black Trackball from PI Engineering combines a high level optical sensor capable of resolutions up to 1600 CPI (counts per inch) with a robust build and history of durability, reliability and performance, carrying on the legacy of the L-Trac and PC-Trac Trackballs formerly manufactured by Clearly Superior Technologies. The L-Trac features an optical laser sensor that offers "button selectable" tracking resolutions of 400, 800 and 1600 CPI, easily changed on the fly. Combined with this is the ability of the L-Trac to track at speeds exceeding 30 inches per second, even at a 20G acceleration rate. A wide light touch scroll wheel or cylinder is readily accessible, located above the center button. In addition, two 3.5 mm jacks permit the attachment of two external switches which can be programmed to perform an additional two actions, resulting in full 5-button functionality. The programming software can also be used to disable or reassign any or all of the on-board buttons when used with external switches in an assistive application.

The L-Trac provides users with a precision, high performance pointing device. The large 57 mm diameter weighted trackball produces predictable, quick, and precise cursor control. Most users will find that movement becomes intuitive within a few minutes of use, with the level of control increasing over time.

The level of performance and range of features, coupled with the proven contour of the L-Trac makes these trackballs an appropriate option for all applications including general computing, gaming and Computer Aided Design (CAD). CAD users love it because a line can be dragged one pixel even on high resolution displays. Then, with a button stroke, the cursor can fly around the screen to get general tasks done. The L-Trac is known for providing fingertip control and precision, high performance tracking.

Designed to minimize the effects of contamination build up and the resultant degradation of performance, this high performance laser trackball uses highly polished stainless steel rollers. These rollers tend to collect less dirt and debris than the mechanisms used in most other trackballs and are easily cleaned by spinning the ball rapidly.

The n-ABLER PRO Trackball from Pretorian is specifically designed to address the needs of computer users with limited hand control, motor skill difficulties, poor hand-eye coordination, lack of manual dexterity and involuntary muscle spasms. This functionality is packaged in a "Professional" housing that will blend easily into office or classroom environments, reducing undesired attention. The glossy silver upper housing offers limited resistance to hand repositioning and the black buttons feature contrasting white legends for increased visibility.

The n-ABLER PRO Trackball offers the same basic functions (cursor control, left click, right click, double click, and drag lock) as does the standard n-ABLER Trackball but in addition also offers a locking "pan" function which enables vertical and horizontal scrolling using the trackball without the need to hold down a button. It also features an "Anti-Tremor" function with three settings to enhance cursor control for users experiencing hand tremors of varying degrees.

Cursor control is provided by a large 63 mm, free-running ball which responds to minimal effort. To avoid accidental movement the trackball projects only slightly above the housing, with the activation buttons fully recessed to avoid accidental activation as well as to aid users in button targeting. Dual mini-phono jacks permit the attachment of a variety of external switches to provide users with easier access to the Left and Right click functions. Users who find the traditional orientation unsuitable have the option of 'teaching' the trackball to orient itself at 90° increments, freeing the user to change the housing orientation for optimum usage and comfort. The trackball also offers an optional buzzer setting which provides notification as specific functions are activated or deactivated.

The design of the n-ABLER PRO Trackball offers fingertip precision control and requires only minimal hand movement. This can reduce wrist and elbow fatigue, as it requires noticeably less effort. The symmetrical design enables users to work with either hand without having to angle the wrist, and the unit can also be configured for left-handed operation. Its large, integrated hand support/palm rest makes work posture more relaxed and less strained.

Note: The release of iOS13 for Apple portable devices included support for USB Pointing Devices. This means that virtually all of the Pretorian Mouse Replacement solutions can now be used with iPads and iPhones that have iOS13 or newer. Connection to the portable device requires a camera adapter cable. Because the mousing device will be powered by the phone or tablet it is preferable to use one with pass-through charging so the portable device can charge while the mousing device is attached and in use.

The Orbit Trackball with Scroll Ring from Kensington is an ambidextrous alternative to traditional mice which require a constant grip to be used and a larger amount of space on the desktop. The 40 mm trackball features optical tracking for accuracy and is centrally positioned for ease of movement by the fingers. Left and Right buttons are located adjacent to the ball, with the thumb and pinkie fingers naturally dropping into position over them. The convenient Scroll Ring surrounds the base of the trackball and provides fingertip control of scrolling, from line-by-line to speeding through pages. The optional TrackballWorks programming software permits customization or reassignment of the buttons and offers advanced scrolling control options.The Orbit Trackball with Scroll Ring is sized to best fit the needs of small to average sized hands. Users with larger hands may wish to consider one of the larger trackball options.

The Optima Trackball from Pretorian is a durable desktop trackball designed with the requirements of users with limited motor skills in mind, yet totally suitable for use by a wide range of users. The angled housing provides an ergonomically supportive position for the hand by providing a place to rest during use.

The large 2" diameter trackball rises 0.7" above the trackball housing, presenting a significant profile for the hand to make contact with. The free-running trackball is securely mounted in the housing and offers smooth movement from even a light touch. Tracking is provided by an optical sensor which eliminates mechanical parts which can fail from wear while still offering precise tracking and cursor control.

Colour-coded and recessed control buttons for Left Click, Right Click, and Drag-Lock are positioned above the trackball. The recessed location assists users in guiding their fingers to the appropriate buttons as well as preventing accidental activation that could occur with flush or raised buttons. In addition, the Optima is also equipped with dual ports which accommodate the attachment of external switches for activation of the left and right click functions. These can be used to offer users with limited motor control alternative methods of clicking.

Note: The latest release of iOS13 for Apple portable devices includes support for USB Pointing Devices. This means that virtually all of the Pretorian Mouse Replacement solutions can now be used with iPads and iPhones that have iOS13 or newer. Connection to the portable device requires a "camera adapter cable". Because the mousing device will be powered by the phone or tablet it is preferable to use one with pass-through charging so the portable device can charge while the mousing device is attached and in use.

The Ergo M575 Wireless Trackball from Logitech replaces the earlier M570 Wireless Trackball, offering improved connectivity options. Like its predecessor, the M575 takes most of the repetitive movements and strain which the entire hand usually must perform and allocates all the workload to the thumb. Accurate optical tracking is provided by a laser sensor that offers 400-2000 DPI resolutions. With a contoured body that provides a relaxing support for the hand, the Ergo M575 is equipped with a scroll wheel and right and left click buttons, all positioned as with a traditional mouse. In addition there are Back and Forward Buttons for convenience when browsing through multiple pages. The trackball body is shaped to let the hand rest in a natural relaxed position. As with the earlier M570 model, the M575 is best suited to those with small- or average-sized hands.

Connection can be made via either Bluetooth or the storable USB mini receiver, with a single AA battery providing up to 2 years of service. A battery life indicator will advise when the battery needs replacing. Software available from Logitech offers customization of trackball functions and performance.

Note: As the Ergo M575 places the workload fully upon the thumb, (which on most other trackballs is generally shared amongst several fingers), anyone who has existing thumb issues would be well-advised to consider alternative solutions.

The Orbit Fusion Wireless Trackball from Kensington features a contoured body that supports the hand in a naturally relaxed position, rotated outwards at approximately 40°. The large 40 mm trackball provides silky-smooth and virtually effortless cursor control and is positioned so that multiple fingers can share the workload. Three DPI settings are available, a fixed 400 DPI for fine control and two dynamic ranges of 400-800 and 800-1500 DPI that respond to the rate of the trackball rotation to provide both speed and control. Speed adjustment is achieved via the thumb switch. A convenient patented light-action detent-free scroll ring around the base of the trackball gives quick access to scrolling and for viewing lengthy documents a quick press of the thumb on the middle-click button converts the trackball to scroll function. On the thumb side are conveniently-placed Left Click, Middle Click, Back and Forward, and DPI buttons. A large right-click button is positioned to the right of the trackball for access by the ring finger.

Since the Orbit Fusion connects wirelessly and can be placed on any surface - even soft or uneven ones, this a great mousing option when working on a Smart TV. The 2.4 GHz wireless receiver connects via USB-A or USB-C (using the included adapter) for laptops or devices that do not include full-size USB ports. Basic functions are available plug-and-play but can also be customized using the KensingtonWorks software (Windows and Mac)

Those who in the past may have used the Microsoft Explorer or Logitech TrackMan Marble FX trackballs may find the Orbit Fusion Wireless Trackball to offer a degree of similarity to these discontinued devices. The overall angle, hand placement and finger control are similar and are now combined with improved overall function and performance.

The Pro Fit Ergo TB450 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 TB450 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 TB450 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.

The MX Ergo Wireless Trackball from Logitech shares many design features with the M570 Wireless Trackball. The body contours are virtually identical, with more angular lines and a metallic grey trackball to distinguish it from the M570. The differences focus on improved ergonomics and expanded functionality. The MX Ergo Wireless Trackball features a magnetic base plate on which the trackball can be angled to either 0° or 20° by a simple shift of pressure from the hand and the included 10° accessory wedge can be installed to offer a 10° to 30° option.

The MX Ergo Trackball transfers all cursor control to the thumb, which virtually eliminates arm movement when mousing. Accurate adjustable optical tracking is provided by a 380 DPI laser sensor with a thumb-activated Precision Mode button. The contoured body provides a relaxing support for the hand, naturally positioning the fingers over the right and left buttons. A rubber-coated tilting scroll wheel with crisp detents is 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 MX Ergo Wireless Trackball offers Dual Connectivity - USB via the included Logitech Unifying receiver, or Bluetooth (see Detailed Specifications for compatibility details). Those working with multiple computers at a time may wish to take advantage of the "Logitech Flow" capability to connect with and work seamlessly across two separate computers.Note: As the MX Ergo Wireless Trackball places the workload fully upon the thumb, (which on most other trackballs is generally shared by several fingers), anyone who has existing thumb issues would be well-advised to consider alternative solutions.

The Expert Mouse Wired Trackball from Kensington is a well-established and proven mousing solution. The large lightweight 55 mm ball features a silky, smooth movement that offers sufficient resistance without straining the fingers. This smooth movement, combined with Diamond Eye optical technology, ensures precision level cursor control is available for gaming, photo editing, or everyday work. The Expert Mouse Wired Trackball also features a ScrollRing around the base of the ball, giving users easy access to quick scrolling whenever necessary.

Basic mouse click functions are plug-and-play but users also have the option of installing the TrackballWorks software for total customization of the 4 large buttons surrounding the ball. Custom and program-specific commands and macros can be programmed for easy completion without the hand leaving the trackball. The ambidextrous design easily accommodates both right and left-handed use and includes a detachable rest to aid users in maintaining a more ergonomic neutral wrist alignment.

Users who prefer a wireless device may wish to consider the Expert Mouse Wireless Trackball which offers all of the same functionality as the Expert Mouse Optical but with the addition of both Bluetooth and standard 2.4 Ghz wireless freedom.

The Expert Mouse Wired Trackball will fit most hands. However, if a user has a small hand they may wish to consider the Orbit Trackball with Scroll Ring which features a smaller 40 mm trackball and is better suited for smaller hands.

The Orbit Optical Trackball from Kensington is an ambidextrous alternative to traditional mice which require a constant grip to be used and a larger amount of space on the desktop. The 40 mm trackball utilizes optical tracking for accuracy and is centrally positioned for ease of movement by the fingers. Left and Right buttons are located adjacent to the ball, with the thumb and pinkie fingers naturally dropping into position over them. The Orbit Optical Trackball is sized to best fit the needs of those with small to average sized hands. Individuals with larger hands may wish to consider one of the larger trackball options.

Note: Those who perform large amounts of scrolling need to be aware that the Orbit Optical Trackball does NOT have a mechanism to perform vertical scrolling and should consider a trackball which includes a dedicated scroll wheel or ring such as the Orbit Optical Trackball with Scroll Ring.