... 2.USB cable 3.FM radio, earphone function Features: speaker car audio can link to iPad, MP3, MP4, Notebook, CD, DVD, Mobile ... , iPhone, iPad, computer, handheld game systems, other audio devices equipped with 3.5mm audio jackEach speaker contains built in amp powered by rechargeable ... : AC 120/230 V ( 50/60 Hz )· Impedance: 8 ohms . speaker car audio