click here to buy QQ-Tech? 4GB Waterproof MP3 Player With FM Radio for Swimming Surfing SPA IPX8 (Black) br click here to buy Good for most sports specially designed MP3 player for swimming spa and other water sports br Excellent waterproof performance complying with International Standard IPX7 br Built-in 4G memory comes with waterproof earphones br Rechargeable Battery each time last for 8-12 hours br Systems Windows 98SEME2000XPVistaWin7 Mac OS 86 Music format MP3 WMA