Main chip: LM393, Electret condenser microphone Working voltage: DC 3.3-5V Induction distance is 0.5M Signal output Indication Single channel signal output The output effective signal is low level.
Working voltage: DC 3.3-5V. IC Chip: LM393 Signal output indication. The output is digital. Single channel signal output. With the retaining bolt hole, convenient installation. Output low level and the signal light when there is sound.
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