The ErgoClick Mouse is extremely innovative. As an ergonomic consultant, I suggested that my clients install two mice and use one to move the cursor and the other to click.
This mouse takes it one brilliant step further letting the left palm perform the click functions by shifting the weight of the palm. Then your right hand controls the cursor. The finger can now rest!
This palm based clicking solution eliminates finger movement from your mousing and the click force can be adjusted from 30 grams to 300 grams, another new mousing feature!