Newonline Waistband Tour Teacher Voice Amplifier Portable Microphone Speaker N74
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<div style="text-align:left"><b>[Product Information]</b></br><ul><li><span class="a-list-item"> 
							Built-in rechargeable lithium batteries that last for long continuous use
							
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							Frequency Response:
100HZ ~ 13,000HZ ±1db
							
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							Max Effective Distance:
400SQ.M. / 1200mAh Li-ion Battery or 18650 cells
							
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							AUX input for MP3 player or iPod
							
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