Featuring high-fidelity 9mm neodymium drivers and a gold-plated 3.5mm stereo plug, the iM-490 iMetal Earphones are acoustically engineered and tuned to provide optimal audio quality for your Sansa MP3 player. The iMetal earphones have a unique, lightweight alloy metal body that effectively delivers clear, powerful sound while providing a comfortable listening experience. The style-conscious travel case conveniently stores and carries the earphones, minimizing tangled wires and potential damage.