Sony NW-A55B Walkman NW-A55 Hi-Res 16GB MP3 Player, Grayish Black

Step up your sound with the incredible audio fidelity of the NW-A55. Hear all of your favorite music in authentic Hi-Res audio. through the S-Master HX upscaling. Keep listening for up to 45 hours on a single charge and expand your on-the-go music collection with the SD card slot.