Power supplier:DC5V 
Output power:2W (1KHz,THD10%)
Frequency:200Hz - 20KHZ
Signal & noise ratio:≥85dB
Impedance:4 OHM(Ω)
Li-ion Output:3.7V~4.2V+0.05V  
Li-ion Input:5V  
Lithium battery capacity:250MAH
Speaker Unit:36MM
Case Material: ABS
Dimensions:Dia5*H5.5cm
Weight:60g
Color: OEM