... Applications: Apply to PC, mobile phone ,MP3, MP4 and FM radio etc. Frequence ... Micro SD,U-disk,support MP3 formatApply to PC, mobile phone ,MP3, MP4 and other audio sourceSupports ... proper packaging.On receiving items, we will refund you immediately.Warranty &Maintenance:We provide 1 month ... entire package.). Before returning items, please make sure you get our (the seller’s) return address, and ...