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Main chip:LM393, Electret condenser microphone Working voltage: DC 4-6V; Sensitivity adjustable Output form: Digital and Analog Output Can be used for Acoustic control light , give sound and light alarm working with Photosensitive sensor ,and sound control, sound detect Package Content:5 x Microphone Sensor Module, 1 x 11.8" Female-Male Dupont Cables 20 PIN