http://www.beststockprices.us/computer-electronics/sennheiser-px-100-collapsible-headphones/ Sennheiser PX 100 Collapsible Headphones : The Sennheiser PX 100 Headphones use dynamic supra-aural mini headphones and a slim, lightweight design to provide convenience and superior sound to the traveler or outdoor user. Sennheiser's duoful diaphragms with spiral embossing provide high-resolution sound, while the twin damping technology creates crisp, fast bass response, helped by 80ppi polyureth... Wed, 18 Nov 2009 18:19:31 MST en