The revolutionary Zero Tension Mouse allows all of the muscles of the hand, arm and shoulder to effectively relax. Dr. P. Michael Leahy designed the Zero Tension Mouse to reduce the likelihood of developing repetitive strain injuries. No matter what length of time you spend on the computer, the Zero Tension Mouse will allow you to do it with greater comfort and ease.

• Allows all of the muscles in the hand, arm and shoulder to effectively relax.
• Accurate and smooth control of optical guidance.
• Works well on most surfaces eliminating the need for a mouse pad and it never needs    cleaning!
• Wide scroll wheel.
• USB compatible - NO drivers required - just plug it in and go.
• Mac and PC compatible.
• Right and Left Mouse buttons.
• Digital Optical tracking.
• Available in Small, Medium and Large - small to 5'9" - medium fits 5'9" to 6' - large 6' and above
• Small size NOW AVAILABLE
• Height: 4.5 inches (11.4 cm) Width: 3.4 inches (8.6 cm) Depth: 5.6 inches (14.2 cm)

• Mac OS 8.6 to 9.2.2
• Mac OS X - 10.0 to 10.1.3
• Mac OS X - 10.2 to 10.3.x
• USB port
• Does not work with a PS2/USB connector

• Windows 98 or Window Millennium Edition with a Pentium 133 MHz or higher processor        and 32 MB of RAM
• Windows 2000 Professional or Server with a Pentium 133 MHz or higher processor and        128 MB of RAM
• Windows XP Home or Pro edition with a Pentium 233 MHz or higher processor and              128 MB of RAM
• USB port
• Does not work with Windows 95 or Windows NT