Microsoft Natural Ergo Keyboard 4000 

Description

Get superior comfort with the advanced new design
Reduce your reach for keys with the natural arc that mimics the curve of your fingers
Reduce wrist pronation with the 14-degree gable
Naturally align your wrists with the 12-degree angle split
Use the optional palm lift to create a 7-degree reverse slope for a more natural posture than with a flat keyboard
Get more direct key strikes with less finger effort using the curved key bed
Warranty: three-year limited