QQ-Tech 4GB Waterproof MP3 Player Swimming or other Sports - Green 100% Water-Resistant to a Depth of 3-Meter, Designed for Swimming and Other Sport Activities; Strictly Built with International IPX-8 Certification; 7 Repeat Modes Including Shuffle; High-Fidelity Sound Reproduction - Stereo FM Frequency Range: 87.5MHz - 108MHz IPX-8 Waterproof Rating for Use in 3 Meter Water Depth - Built-in Rechargeable Li-polymer Battery For up to 10 Hour Playing Time - Frequency Response: 20Hz - 20kHz Measures Distance, Steps, Laps, Strokes Taken, Calories Burned - Supports MP3 and WMA Music Formats - Safe Operating Temperature: -23 F -104 F Built-In Pedometer, Stop Watch, Swim Fitness Function Modes - ID Tag Readout on LCD Display Showing Song/Track Information - EQ Settings: Nature, Rock, Pop, Classic, Soft, Jazz