multi-media USB mini speaker box 1,double play format MP3,WMA 2,high capcitive ... . Selling PointSupport USB Flash Driver, SD card, Line In, Torch Light, FMSD card, Line In,FMSpecificationOutput power3W2WSNR≥ 60 dBA≥ 60 dBAFrequency response20 ... V (maximum 2V ppm)0.5 V (maximum 2V ppm)Speaker Impedance4Ω4ΩDistortion≤5%≤5%Torch LightΦ5N/A FM ...