Applications: Apply to PC, mobile phone ,MP3, MP4 and FM radio etc. Frequence response: 150Hz-18KHz lovely ... SpeakersPlay music from Micro SD,U-disk,support MP3 formatApply to PC, mobile phone ,MP3, MP4 and other audio sourceSupports FM radio ... returning items, please make sure you get our (the seller’s) return address, and write “gift” on the delivery detail sheet ...