Adesso IMOUSE E90 Mouse Radio Frequency Usb Type A Optical 6 ButtonS Black 1 Eac\n\nAdesso iMouse E90 Mouse - Radio Frequency - USB Type A - Optical - 6 Button(s) - Black - 1 Each - Wireless - 9.14 m - 2.40 GHz - 1600 dpi - Scroll Wheel - Left-handed - 2 x AAA Battery Supported\niMouse--- E90 Wireless 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 switchable DPI control provides three levels of mouse cursor speed that works in different environments. iMouse--- E90 - ;