DetailsEnjoy music and hand-free calling on the go. You may need an in-car wireless FM transmitter to stream music from your smartphone, tablet, TF card, even USB flash disk to the car stereo system. The included wireless 4.2 earphone has built-in high-sensitive microphone with CVC noise cancellation for crystal hands-free call. Moreover, dual USB charge ports always keep your mobile devices fully charged. In a word, full of Power and crystal stereo music makes your travel more enjoyable and pas