Make sure this fitsby entering your model number.
Ergonomic sculpted design – unique adjustable hinge allows you to customize the trackball angle from 0 to 20 degrees for a more natural, comfortable hand position, and reduced muscle strain
Cross-computer control- game-changing capacity to navigate seamlessly on 2 computers, and copy-paste text, images, and files from one to the other using Logitech flow

Make sure this fitsby entering your model number.
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 800DPI, 1200DPI and 1600DPI depending on your needs. The DPI indicator will show you clearly