Uwater G4 Waterproof MP3, BLK/YELLOW 100% Waterproof MP3 Player and Earphones Play Time: Continuous 6 HRS (MP3) Built-in high performance (1000+ cycles) Li-ion Rechargeable Battery IPX8 Waterproof Certification (10Ft/3M) System Compliant: Win 7/XP/ 2000/ Vista/ MAC 9.0 & Higher