Sound sensor LM393

First, size: length 32mm X 17mm X height 15mm width
Second, the main chip: LM393, electret microphone
Third, the working voltage: DC 4-6 V
Four, features:

1, a signal output indication.
2, the single signal output.
3, the output valid signal is low.
4, when the output low voice, bright lights.
5, can be used for voice-activated lights, with light sensors make a sound and light alarm, and voice control, voice detection occasions.
6, the circuit board output switch!