Featuring high fidelity 9mm neodymium drivers and a gold plated 3.5mm stereo plug, the iM/490S 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. The iMetal earphones work with any Sansa MP3 player. Also compatible with any audio device equipped with a standard 3.5mm jack.