1. Portableback-hangdesign.Convenientforsport.2. Voltage:3.7V;3. USBpower;USB2.0;4. 150mAHrechargeableLi-onbattery.Playingtime:3hours;5. Support:MP3,WMA,WV,RM,OGG,APE,CD,WAV;6. Memoryupto4GB;7. Key-press:Volume+/-、Play/Pause/、Previous/Next8. 16Levelvolumecontrol;9. LEDindicationlight;SpeakerPower:2X10mW