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Description
<1>Operating Voltage: 3.3V to 5V DC
<2>LM393 comparator with threshold preset
<3>PCB Size: 3.4cm * 1.6cm
<4>Induction distance: 0.5 Meter
<5>Operating current: 4~5 mA
<6>Microphone Sensitivity (1kHz): 52 to 48 dB
<7>Easy to use with Microcontrollers or even with normal Digital/Analog IC
<8>Small, cheap and easily available
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