Pro Fit Ergo Wired Mouse - With Its Built-In Wrist Support And Neutral Grip, The Ergonomist-Approved Pro Fit Ergo Wired Mouse Positions Your Hand For Improved Comfort. Features Include Quiet Clicking, Plug & Play Usb Connection, Five Buttons (Including Forward And Back), And Four Dpi Settings (1000/1600/2400/3200).Ergonomist-Approved Design Positions Your Hand For Improved Comfort.Built-In Wrist Rest And Neutral Grip Supports, Cushions, And Positions The Wrist For Comfort And Neutral Hand Alignment.Quiet Clicking Makes For Smooth And Non-Disruptive Operation.Plug & Play Usb Connection Is Simple And Reliable.Five Buttons (Including Forward And Back) Enhance Navigation And Productivity.