Boomz Portable Speaker Plays with Any USB - Green - M2X218011G Output power: RMS 3W THD = 10% Frequency Response: 150 -18000Hz (+3dB) Signal and Noise Ratio of Power: (SNR): &gt;80dB Measurements: 2 X 2 Magnetic Resistant 40hms Line In: 3.5mm Stereo Plugs Power Input: USB power adapter cable 5V /1000mA