Sony NW-WS413 Waterproof All-in-One MP3 Player 4 GB Multiple Colors
, Ambient Sound Mode OFF: 12 hours (approx.)., Ambient Sound Mode OFF: 10 hours (approx.). Microsoft Windows® 8, Windows® 7 (SP1 or later), Windows Vista® (SP2 or later), Windows® XP5 (SP3 or later), Mac OS® X (v10.6 or later).