BOOMZ Audio powerful mini MP3 Player/Speaker (pink) for Cellphone / Smartphone /Android Phone -Line In: 3.5mm Stereo Plugs -Magnetic Resistant 40hms -Measurements: 2 X 2 -Signal and Noise Ratio of Power: (SNR): &gt;80dB -Power Input: USB power adapter cable 5V /1000mA -Frequency Response: 150 -18000Hz (+3dB) -Output power: RMS 3W THD = 10%