... Response: 100HZ ~ 13,000 HZ + 1db Consumption Current: 150mA Voltage: DC 7.5, li-ion battery Battery Type: Lithium Battery Size ... make use of an exterior alternating current, or AC power source, collecting the power from an ordinary wall outlet and storing it up ... relatively quickly, distorting or "clipping" the audio signal into raw DC current that can destroy the delicate wires that transfer signals ...