portable Mini Speaker of laptop,Support USB and SD card
The first one with moveable charge
The earliest made external batteri

*USB Mini Speaker for laptop, mp3 and mobile phone
*Support USB and SD card
*Stereo sound design, limited space to enjoy unlimited high-fidelity music
*Built-in rechargeable lithium battery (standby 240 minutes)
*3.5MM headphone output interface.wallson amplifier
*Audio output connection with computer, laptop ect.
*Size: 33*70*174mm, weight: 0.303kgs
*OEM color and logo print are welcome
*Output power:3.2W*2RMS
*Speaker unit:1.5*2(antmagnetic)
*Frequency Response:160Hz-20KHz
*Power Voltage: USB,DC 5V/500mAh
*Distortion: ≤0.3 %( 1W 1KHZ)
*Separation:≥75dB
*S/N Rate: ≥82dB
*Accessories: USB cable, audio cable, battery