1.Multifunction portable speaker 2.Apply to PC, mobile phone ,MP3, MP4 and other audio source 3.Supports FM radio function U-21 patent ... PC, mobile phone ,MP3, MP4 and other audio sourceSupports FM radio function Rated Power: 5W Speaker unit:80mm, 4ΩFrequence response: 150Hz ... ,Built-in SD card music player,High sensitive antenna FM radio, all can active play 2,no sound insulation field,sound ...