* Vacuum Bass Small in size but big in bass
* In-built Rechargeable Battery cost efficient& Daily convenience
* SD card support for wireless music
* FM radio function
Specifications:
* Frequency Response:100Hz-20kHz
* Singal-to-Noise:>85dB
* Distortion:<0.5%
* Battery Voltage:3.7V
* Battery capatity: 600 MAH
* Battery charging voltage: 4.2 V+0.05V
* Charge time:DC (2.5 hours) via USB 4hours