SOUND SENSOR for Arduino HOT Product Description Sound sensor voice sensor Intelligent vehicle for Arduino HOT allmartbd Features: 1. Single channel signal output 2. The output effective signal is low level 3. When there is sound, outputs low level and the signal light 4. Can be used for Acoustic control light, give sound and light alarm working with Photosensitive sensor ,and sound control, sound detect 5. Circuit board output switch quantity Specification: Main chip: LM393, Electret condenser microphone Working voltage: DC 4-6V Size: 38mm * 16mm * 9mm Weight: 3g Contains: 1x Sound detection sensor module.