"I read the site and it doesn't describe how the product works. Specifically, does the device point to the path of least air resistance? Does the device operate with a ""floating"" triangle, like a weathervane, to point in the direction of the least air resistance?

More clarification on the website regarding how the device works would be helpful."

$130? Wouldn't a piece of wool taped to the handlebars be cheaper and just as effective?