Combining convenience with quality, the silver NW-ZX507 Walkman Digital Audio Player from Sony is engineered to deliver a high-end audio experience on the go. The ZX507 supports High-Res Audio playback at higher bitrates than CD audio, along with additional technologies to enhance your music. The S-Master HX digital amp works towards reducing distortion and noise, while DSEE HX upscales your compressed files to return lost audio fidelity. You can play back your improved audio through a dedicated 4.4mm balanced or 3.5mm unbalanced headphone port.