That's what I previously thought, but I looked on vision's website and the only shifters that I could see were these ones ( http://www.visiontechusa.com/products/groupset/trimax-tt/ ). Then I looked under brakes and found these ( http://www.visiontechusa.com/products/brake-levers/metron-aero-brake-lever/ ) which look pretty similar to those pictured above (including the little button etc) but the description only mentions braking...
The top image is described "The left extension has a custom setup with a rear brake lever which allows the rider to use the brakes while in the aero bars."
@hippy started
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That's what I previously thought, but I looked on vision's website and the only shifters that I could see were these ones ( http://www.visiontechusa.com/products/groupset/trimax-tt/ ). Then I looked under brakes and found these ( http://www.visiontechusa.com/products/brake-levers/metron-aero-brake-lever/ ) which look pretty similar to those pictured above (including the little button etc) but the description only mentions braking...