Features6 buttonsUp to 1600 DPIIce blue illuminationVertical orientation and contoured shapeAdvanced optical sensor technologyThis Adesso iMouse E1 Vertical Ergonomic Illuminated 6-Button Optical Mouse is designed with a vertical orientation and a contoured shape that provides a uniquely comfortable user experience. With 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 1000/1600 switchable DPI control provides two 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.Finally the iMouse E1 is plug and play and requires no drivers. Simply plug into any available USB port and be ready to enjoy a different kind of mouse experience!You’ll be proud to show off your fashionable iMouse E1 with the “ice blue” illumination contrasting against the glossy black case.The vertical design provides better support for your forearm minimizing wrist pain that can come from twisting.The “hand-shake” grip helps reducing muscle stress and risk of Carpal Tunnel Syndrome.