Festures :
Operation Time: about 8 hours
Built-in flash memory up to 16GB
Support: MP3/WMA format
User For: bicyclist, runners, joggers, walkers etc
Great-sounding lets you enjoy your sports and music at the same time
Powered by USB cable, use mini USB 5V charger to recharge it for 2~3 hours
With built-in rechargeable polymer Lithium battery offers high safety and stability and avoid over-charge and over-discharge

Specifications:
Output Frequency: 20Hz-20kHz
Working Temperature: -10~45 Celsius
Operating system: Windows 98/ 2000/ XP/ Win 7
Cable Length: App.51cm/20.0 inch
Size: App.15.5 x 12cm / 6.10 x 4.72 inch

How To Use:
1. Switch the power button to "ON", and then the LED turns on, press the function button (MODE), the default status radio is enabled and the earphone works
2. MP3 Playback: Insert TF card in proper direction and the product automatically switch to MP3 playback mode. Press previous/next to perform the corresponding operations.
3. Pause Playback: press button >||
4. Volume Control: Long press the Previous/Next button to volume up or down
5. Power Off: Push the switch to "OFF"

Note:
It ONLY supports play music from TF card.TF card NOT included.

Included:
1 x Wireless Sport Headphone MP3
1 x USB Charging Cable

If you are unsatisfied with your item for any reason, return it within 30 days of delivery.