Hi #RekanEasyWare ... EasyWare Part#: EP000473 Features amp; Spesifications : - Main chip: LM393, Electret condenser microphone - Working voltage: DC 4-6V - Signal output indication - Single channel signal output - The output effective signal is low level - When there is sound, outputs low level and the signal light - Can be used for Acoustic control light , give sound and light alarm working with Photosensitive sensor ,and sound control, sound detect - Circuit board output switch quantity - The Maximum induction distance is 0.5 Package : - 1x High Sensitivity Sound Microphone Sensor Detection Module For Arduino AVR PIC KY-037