The Only Mouse with Gravity Defying Comfort Pivot Technology. No other portable mouse provides the fluid, air-like comfort of the patented Ergo Motion? pivot system. You can finally say goodbye to aches and pains while using a computer mouse. Whether you are right- or left-handed, you can enjoy the unique on-the-go experience of the Award Winning computer mouse that experts from MacWorld Magazine and PC World, agree will forever change your mousing experience! The Ergo Motion pivot system reduces your risk of Repetitive Stress Injury (RSI) by adding motion! The magic of the function is how it naturally adapts to your hand motion rather than the other way around! While all other computer mice require your hand and wrist to remain in a fixed position, the Whirl? Mini pivots naturally as you move, automatically changing its angle infinitely to match your wrist and hand- a luxurious feel helping you enjoy personalized comfort all day long! The patented breakthrough innovation of Ergo Motion truly redefines comfort for a Computer Mouse by going well beyond merely providing an ergonomic grip. The mouse will lean, swivel or pivot with your movement so your hand and wrist are never in a fixed position, creating the most comfortable and healthy mousing experience ever. You'll quickly realize how beneficial it is for your computer mouse to follow your motion by creating a Dynamic Neutral Position no matter what direction or angle you are moving. This virtually eliminates the possibility of static joint pain by allowing full circulation through your wrist and hands throughout the day. Key Features The perfectly portable Whirl Mini Notebook Mouse with Ergo Motion combines they remarkably natural comfort of the patented Ergo Motion pivot system with the most sought-after computer mouse features: Up to 800-dpi hi-def laser sensitivity, 2.4 GHz wireless connectivity, ambidextrous design and extra long battery life.