Rated Impedance：       4Ω±0.5Ω
Output Power：          3W（1KHZ，THD10%）
Supply Voltage：         3V（3——4.5V,  2*AA）
Circuit Current：         ≤300mA
Frequency Response：   （150HZ——20KHZ），
Supply Voltage Rejection： ≥48dB

Feature:
1) 2.0speaker for computer,pc/mp3/4 
2) Carry-home, plug and play
3) Clearly sound and lower price
4)Can also be powered by PC through a USB connection    
5) Low power consumption design