File:SONY NW-ZX507 Walkman playing music.png - Wikimedia Commons
Sony NW-ZX507 Walkman Review - Moon Audio
The Walkman Blog: Sony's Upcoming NW-ZX507 Walkman: Multi-source music with high quality sound
Sony NW-ZX507 Walkman® High-resolution portable digital music player with Wi-Fi® and Bluetooth® at Crutchfield
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1 week review of Sony NW-ZX507 (NW-ZX500 Series) | Headphone Reviews and Discussion - Head-Fi.org