Output Power: 15 W
Frequency Response:  45Hz-250kHz
S/N Ratio: ≥63dB(A Weighted）
Input Sensitivity: ≤220mV
Overloading Level: ≥10V
Speaker Impedance: 8Ω
Input Impedance:  20kΩ
Power Supply:  120V 60Hz 30W
Net Weight: 4.5KG/pcs              
Dimension: 241mm×242mm×212mm 

30 Days refund and 90 days replacement.

http://www.6moons.com/audioreviews/qinpu2/system.html

Output Power: 15 W
Frequency Response:  45Hz-250kHz
S/N Ratio: ≥63dB(A Weighted）
Input Sensitivity: ≤220mV
Overloading Level: ≥10V
Speaker Impedance: 8Ω
Input Impedance:  20kΩ
Power Supply:  120V 60Hz 30W
Net Weight: 4.5KG/pcs              
Dimension: 241mm×242mm×212mm 

30 Days refund and 90 days replacement.