I previously (November 2009) purchased two autogenerators from Calla Breeze which failed miserably in the following ways: 1. The small mini breeze only produced 3 volts, even with winds of 15 mph. Also, that wind speed alone broke one of the "blades" and then the turbine itself. My father even tried to patch it up but he was unsuccesful. This is why the returned merchandise has silicone on it. Such an expensive device should not only work and produce the voltage indicated on your website, but should definately NOT break under the... read full review »