... 2.USB cable 3.FM radio, earphone function Features: speaker car audio can link to iPad, MP3, MP4, Notebook, CD, DVD ... rechargeable batteryIncludes speaker cable with USB plug for charging speakersVacuum bass design for enhanced low frequency response and sound beyond sizeMagnetic ... 120/230 V ( 50/60 Hz )· Impedance: 8 ohms . speaker car audio