multi-media USB mini speaker box 1,double play format MP3,WMA 2,high capcitive battery ... . Selling PointSupport USB Flash Driver, SD card, Line In, Torch Light, FMSD card, Line In,FMSpecificationOutput power3W2WSNR≥ 60 dBA≥ 60 dBAFrequency ... (maximum 2V ppm)Speaker Impedance4Ω4ΩDistortion≤5%≤5%Torch LightΦ5N/A FM FM moduleP5807P5807FM band range87.5 - 108 MHz87 ...