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