1.Multifunction portable speaker 2.Apply to PC, mobile phone ,MP3, MP4 and other audio source 3.Supports FM radio function U-21 patent productApple shape USB/SD/MMC speakersPlay music from Micro SD,U-disk,support MP3 formatApply to PC, mobile phone ,MP3, MP4 and other audio sourceSupports FM radio function Rated Power: 5W Speaker unit:80mm, 4ΩFrequence response: 150Hz-16KHzS/N Ratio: ≥ ...