From Contour Design, the creator of the original RollerMouse and Contour mouse comes the New Rollermouse Free!

Key Features and Benefits: 

• Eliminates reaching for a traditional mouse, relieving neck, shoulder and elbow pain. Asymmetrical reaching with one side of your body and not the other causes your muscle groups to compensate for the weight of your extended arm while reaching for a traditional mouse. Repetitive reaching oftentimes leads to tightness and pain in the neck, shoulder and elbow areas. The RollerMouse Free allows you to keep your elbows comfortably by your side, which is a more beneficial ergonomic position. Thousands of users have thanked us due to the pain relief they have realized after using the RollerMouse for a short period of time. Please review the testimonials linked to this page for their direct feedback.
• There is no gripping necessary, thus avoiding the threat of Repetitive Strain Injuries such as Carpal Tunnel Syndrome and Tendonitis. The RollerMouse Free is controlled with the use of an unflexed hand, so there is no need to clutch or hold the device in order to navigate the cursor. Your fingertips roll a narrow bar both up and down and from side to side simultaneously to navigate the cursor over the entire screen, with very little friction or resistance. The elimination of flexing your fingers avoids activity through the carpal tunnel, overuse of a traditional mouse can aggravate the carpal tunnel and lead to numbness, tingling and pain.
• Promotes the equal use of both hands, reducing the risk of injuring your dominant “mousing” hand. With the mouse buttons centered beneath the keyboard home keys, mouse control is equidistant from either hand. Ambidextrous use is encouraged and easily accomplished with your command buttons literally at your fingertips, for both hands.
• Useful for both laptop and desktop computer applications. The RollerMouse Free has been designed to fit immediately adjacent to your keyboard or laptop. This places the mousing controls just a few inches below the home keys, keeping your hands within a small work area, eliminating large reaching motions.
• Convenient, out of the box, “plug and play” connectivity for both PC and Mac computers. This HID compliant device has the drivers “on board” and simply needs to be plugged into any empty USB port, without the need for a cumbersome connection routine.
• Seven powerful button functions right out of the box. There are two easy options to perform a “left click.” Either push down on the navigation bar itself, or click on the large left button in the button control area. Other button functions include a traditional “right click” button, a single touch “double click” button, a scroll wheel, a scroll lock , “one touch” copy and “one touch” paste. For a visual demonstration, please activate the “watch video” button on this web page.
• Custom button configuration available with the use of the Driver Disk included in the box. Although most customers use the RollerMouse button functions “as is,” specialized functions can be mapped to the button controls after loading the device drivers provided on a convenient CD ROM.

RollerMouse Free in use with Laptop

•  Cursor pointing and clicking is accomplished by the Rollerbar in the lower center of the Rollermouse. 
  
• You can adjust the click force on the rollerbar (5 levels of tension) using a simple knob under RollerMouse. (Rollerbar click function can be disabled using dip switch if user prefers using buttons)
  
• The rollerbar slides easily on steel coated with soft rubber for precise cursor control
  
• Long lasting optical sensor reads bar movement using the latest technology.
  
• Had 5 available user-definable buttons and a scroll wheel.
  
•  You can configure buttons for click, double-click and draglock via dip switches or software (depends on version)
  
• USB connection
  
• 2 year warranty

System Requirements:

• PC with available USB or PS2 port.
  Serial ports are NOT supported. Macintosh with available USB port only, no ADB support available
  
• Recommended for use with 101 
  key "straight" style keyboards. Or the Kinesis Maxim keyboard. Or the Goldtouch Keyboard.
  
• Supported by virtually all operating systems with USB or PS2 support. (Some operating systems require driver to enable Scroll Wheel support