Sony 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. Features: * Precision engineered for improved sound quality * Truly authentic sound with Hi-Res Audio * S-Master HX digital amplifier for pure sound quality * DSEE HX upscaling restores quality to compressed files * In the box: Walkman, USB cable, Startup Guide, Instruction Manual