ERGONOMIC DESIGN FOR MAXIMUM COMFORT -- Upgraded ergonomics, every detail is carefully crafted to fully fit your hand. The diamond pattern of waist surface prevents your palm from sweaty after long time handling. Extended wrist rest provides you the most use friendly experience, you could say goodbye to hand pain forever with this well-design ergonomic mouse! Above all, skin-friendly materials covered on the surface of the vertical mouse, giving you an ultra comfortable baby skin-touch feeling!ULTRA PRECISE MOVEMENT -- Enjoy fluent tracking on just about any surface (except glass or ultra slippery surface). The ergonomic mouse carefully calculates weight and stability, 5 slide pads bulge out from the bottom, to ensure you can move the wireless vertical mouse smoothly without any cursor shaking, and every of your movemnt will be tracked precisely. You can also adjust it between 3 resolutions of 600DPI, 1200DPI and 1600DPI depending on your needs.