Sony NW‑WS413 is a compact on‑ear music player that stays dry up to 2 m, runs from –5 °C to 45 °C, and offers 12 hours of playback with 4 GB internal storage for MP3, AAC, WMA or LPCM files. Its IP65 seal protects against dust and splashes, while a single‑button earbud controls tracks and a quick‑charge USB 2.0 port keeps it ready for any workout or swim.