Boomz M2x218011bu Blue Portable Speakers Plays With All Usb 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