Waterproof Underwater 2GB WMA MP3 Player Swimming Water Color: black Capacity: 2GB Dimension: about 63mm x 21mm x 21mm Support MP3 / WMA Waterproof rating: comply with International Standard IPX7 Support windows98/ME/2000/XP/Vista, Mac OS 8.6 Battery operating time: 8 - 9 hours Working temperature: 0¡ãC - 50¡ãC Working humidity: 20%-100% 1 X MP3