It looks like you mistyped the URL in your address bar or have followed an old bookmark.
The RTK Facet joins the ranks of SparkFun's enclosed surveying tools at a fraction of the price of comparable products.
SparkFun's resident audiophile Pete Lewis has been hard at work for a long time developing his own pair of customized headphones. His newest tutorial will guide you through how to build your own headphones with ambient microphones.