Adesso introduces relief and comfort for left handed users and gamers with the iMouse E7 USB Vertical Left-Handed Mouse! If your wrist pain just won't seem to go away, try a specially designed vertical mouse that completely changes your stance and keeps your hand in its natural "handshaking" position. The shape is thoroughly designed for natural comfort and easy-to-reach mouse buttons. No finger stretching or reaching is needed to press or operate the buttons. For gaming, the built-in DPI switch on the top allows for convenient adjustment of your browsing precision without even letting go of the iMouse E7. Optional advanced programming software will allow you to control and customize all six buttons, LED colors and assign macro keys. The iMouse E7 also comes with three additional weights inside that you can remove or adjust for a sturdier or lighter feel depending on your preference. Start browsing the internet, your email and achieve victory with various online games with the new Adesso iMouse E7 USB Vertical Left-Handed Mouse. TAA Compliant Mouse is an input device designed for GSA sales to government agencies, the military, their suppliers and vendors, and other organizations requiring end products manufactured to U.S. Trade Agreement Act Specifications. Model: IMOUSEE7TAA.