Sony NWZ-W252 Headphone-style Walkman MP3 Player (Metal Gear Solid Camouflage Limited Edition) Limited Metal Gear Solid Edition with a Camouflage Design Headphone-style Walkman, freed from headphone cables, compact and lightweight Water-resistant (not meant to be immersed or come in continuous contact with water) Exceptional sound quality with 13.5mm EX headphones Multi audio format support : MP3/ AAC-LC (NON DRM) / WMA / WMA-DRM