rather than on the top of the mouse to reduce the strain on the index finger, which is already heavily used for the primary mouse click. At the bottom of the integrated Thumb Support is the innovative two-position side rocker switch which gives quick and effortless access to two additional programmable buttons. Sculpted Elevated Buttons Elevated Wrist Support Operating Systems: Windows XP Windows 2000 Windows Me Windows 98 Mac OS X Mac OS 9.x and earlier* Linux SUN/IBM/HP: SUN Blade Workstations SUN Ray SUN SPARC IBM RS-6000 Workstations HP Workstations Note: For PC: Working on the specified OS with full-featured driver For SUN/IBM/HP: Working on the specified OS with the OS's own drivers For Mac: Working on the specified OS with full-featured driver Working on the specified OS with the OS's own drivers * Additional functionality can be added to device by downloading 3rd Party Shareware driver Mouse PMO-S-R Optical Contour Design, Inc PMO PMO Perfit Mouse Optical Small Right Handed Contour Wired Not Applicable 800 dpi Ergonomic Right-handed Only USB Scroll Wheel  (less)

rather than on the top of the mouse to reduce the strain on the index finger, which is already heavily used for the primary mouse click. At the bottom of the integrated Thumb Support is the innovative two-position side rocker switch which gives quick and effortless access to two additional programmable buttons. Sculpted Elevated Buttons Elevated Wrist Support Operating Systems: Windows XP Windows 2000 Windows Me Windows 98 Mac OS X Mac OS 9.x and earlier* Linux SUN/IBM/HP: SUN Blade Workstations SUN Ray SUN SPARC IBM RS-6000 Workstations HP Workstations Note: For PC: Working on the specified OS with full-featured driver For SUN/IBM/HP: Working on the specified OS with the OS's own drivers For Mac: Working on the specified OS with full-featured driver Working on the specified OS with the OS's own drivers * Additional functionality can be added to device by downloading 3rd Party Shareware driver Mouse PMO-L-R Optical Contour Design, Inc PMO PMO Perfit Mouse Optical Large Right Handed Contour Wired Not Applicable 800 dpi Right-handed Only Ergonomic USB Scroll Wheel  (less)

excellent cursor control. The Perfit Mouse Classic Plus places a scroll wheel above the thumb support, rather than on the top of the mouse to reduce the strain on the index finger, which is already heavily used for the primary mouse click. At the bottom of the integrated Thumb Support is the innovative two-position side rocker switch, which gives quick and effortless access to two additional programmable buttons.  (less)

design places cursor control just below the spacebar of any keyboard, making data entry faster, safer, and more comfortable for right- or left-handed computer users. Slide, roll and click in one action - superior to trackballs and touchpads.Auxiliary PS/2 port allows the use of an additional input device, such as Perfit Mouse.  (less)

hand rest that mirrors the contour of the hand. Combined with the special "Ambidextrous" feature, the CSTrac accommodates both right and left handed users (without changing system settings) and hands of all sizes. No need to move your arm or rotate your wrist from side to side. You'll enjoy this trackball's ability to dynamically accelerate across the screen as you turn the ball faster. This trackball mouse will enhance any system.  (less)