... USB cable 3.FM radio, earphone function Features: speaker car audio can link to iPad, MP3, MP4, Notebook, CD, DVD ... 3.5mm audio jackEach speaker contains built in amp powered by rechargeable batteryIncludes speaker cable with USB plug for charging ... frequency:150-18000HZ(±3dB)· Nominal Output Power (Total): 100 Watt · Audio Amplifier: Integrated · Connectivity Technology: Wired · Power supply:DC5V· ...