Evoluent's ergonomic VerticalMouse D USB Wired Mouse gently supports your right hand in an upright neutral position. The patented shape prevents you from twisting your forearm like you usually do with an ordinary mouse.Avoids Forearm Twisting For ComfortThe ergonomic shape supports your hand in a handshake position. Since 2002, users continue to report that Evoluent VerticalMouse provides superior comfort and even relieves their wrist pain.Extended Lip Prevents RubbingAn extra-wide lip along the bottom edge prevents the last finger from rubbing the desk.Easy-To-Reach Thumb ButtonsSmartly-placed thumb buttons are both within easy reach at the top and bottom of a contoured thumb rest.Adjustable Pointer SpeedA button behind the wheel enables quickly changing the pointer speed to suit different tasks: select a higher speed (higher DPI) to make the pointer move faster for general use; select lower speed (lower DPI) to make the pointer move slower and more precisely for drawing, photo editing, etc.Pointer Speed IndicatorsUp to four lights show pointer speeds from slow to fast: slow speed or low DPI for precision work such as photo editing or drawing; fast speed or high DPI for quickly moving across the screen for general tasks.Laser SensorA laser sensor ensures reliable tracking on most surfaces.Copy/Paste and Much MoreConfigure the buttons to perform nearly any function you wish — such as Copy or Paste — with fewer clicks and mouse movements.Excel Horizontal ScrollScroll horizontally in Microsoft Excel by pressing a thumb button and rolling the wheel.Smart ScrollingDramatically varies sensitivity per notch in response to the speed you roll the wheel, from slow-and-precise all the way to hyper speed for blazing through long pages.Eye Comfort ControlQuickly lower your screen’s brightness to help reduce eye strain by simply rolling the mouse wheel. Easily change the brightness of the screen as your ambient light level changes.