This Penguin mouse has a unique vertical alignment, which promotes a more ergonomic operating position to protect against repetitive strain injury (RSI) and carpal tunnel syndrome (CTS). The mouse has an easy glide symmetrical base and a precision performance scroll wheel and laser for accurate tracking. Adjustable 400, 600, 800 or 1200dpi settings provide fast and precise operating movements. The ambidextrous design is suitable for both right and left handed use, with a soft touch key for comfort. The mouse is also antimicrobial to inhibit the growth of bacteria. This wired mouse is medium size for hands measuring 16 - 18cm (6 - 7 inches).