5Pcs Sound Detection Sensor Module LM393 Chip Electret Microphone For Features: The product boast of output signal instruction. Single-channel signal output. Output valid signal is low and the light will be bright. Specification: Weight: 4g Size: 3.1 x 1.6 x 0.8cm Operating current pressure: 4V - 6V Package included: 5 x Sound detection sensor module
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