Sound and Audio detection sensor
Detection Ability - detects sound waves but does not recognize particular sounds not the frequency of a sound. when sound detects the output will go high.
Working Voltage - 3.3 - 5 V
Output - single channel Digital output.
Adjustable Sensitivity - via on-board POT (potentiometer) - This adjusts the OUTPUT voltage trigger point (how much sound is required before the sensor triggers the OUTPUT pin. Adjusting this POT to high will cause the OUTPUT to remain HIGH, to low and OUTPUT will remain LOW. Finding the "sweet spot" where the module responds as desired can be tricky.
Pins on Module - three (3), VCC / GND / OUT is On-Board LEDs - Red LED-power indicator, Green LED-on when sound is detected
Dimensions: 1.73 x 0.63 x 0.35 (inches)