... quality Support USB Flash Driver, SD card, Line In, Torch Light, SpecificationOutput power3W*2SNR≥ 60 dBAFrequency response20-20KHZ, ± 3 dBAUX input ... .5 V (maximum 2V ppm)Speaker Impedance4ΩDistortion≤5%Torch LightΦ5 FM FM moduleP5807FM band range87.5 - 108 MHzSensitivity75 ΩMono ... high qualitySupport USB Flash Driver, SD card, Line In, Torch Light, Portable USB speaker