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 * IPX-8 Waterproof Rating for Use in 3.3 Feet Water Depth - Built-in Rechargeable Li-polymer Battery For up to 10 Hour Playing Time - Frequency Response: 20Hz - 20kHz * 4 GB Music Storage Capacity USB 2.0 File Transfer Interface - Includes Sets of Waterproof and Dry-Use Ear Bud Tips * High-Fidelity Sound Reproduction - Stereo FM Frequency Range: 87.5MHz - 108MHz