lessons learned from the previous two generations.  (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-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)

The patented vertical shape supports your hand in a relaxed handshake position that eliminates forearm twisting. Additionally, this VerticalMouse does not move sideways when clicking with normal force for more ease and comfort. Also, a small lip on the bottom edge prevents the little finger from rubbing the desk. A 2200 dpi true optical resolution sensor moves the pointer quickly to reduce hand movements. Finally, it features 5 buttons- each programmable with different functions in different applications- and are easily operable without contorting your fingers. With such impressive set of features, this right-handed mouse will enrich your computing experience with smooth and responsive movement.  (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)