... computer, MP3, MP4, cellphone, workman 4.FM radio support Specification Speaker MS-031.WEIGHT 380g, 2.SD,USB card support,,can ... )Frequency20--180k(Hz)Degree of diatortion0.5(%)Appearance materialPlastic carton Speaker impdance4(Ω) Size 80*65*65(mm)Weight0.38(kg) Colour ...