Aspect Ratio: UnknownBrand: AdessoColor: BlackFeatures: Left handed? No problem! You can now enjoy our ergonomic vertical mouse design in your LEFT hand!Adjustable 4 Level DPI Switch (800/1200/1600/2400) Attain higher precision and better accuracy with your choice of 4 DPI levelsOptical sensor technology improves precision and even letsyou work on most glass and leather surfaceswithout a need of mouse padTwo Internet navigational buttons back and forward areconveniently located on the left side of mouse to provide youwith Internet browser control with minimal hand movementLegal Disclaimer: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.Platform: Windows 7Publisher: AdessoInc.Warranty: 12 MonthsDetails: This mouse E9 Left-Handed Vertical Ergonomic Mouse is designed with a vertical orientation and a contoured shape that provides a uniquely comfortable user experience. Designed specifically for left-handers this wrist-friendly contour support you will hold your hand in a healthy "handshake position" which is the neutral position of your forearm. This feature prevents your forearm from twisting when using this vertical ergonomic mouse. Featuring two ergonomic buttons that are located conveniently on the side of the mouse allowing seamless back and forth browsing. The 800/1200/1600/2400 switchable DPI control provides four levels of mouse cursor speed that works in different environments. The advanced optical sensor technology keeps the mouse precisely on point and lets you work on most glass wood marble and leather surfaces without a mouse pad.UPC: 783750007696EAN: 0783750007696