Very sensitive module with 2 outputs. AO - analog input, real-time output voltage signal of the microphone. DO - digital output depends on the volume and the set limit. Specifications - voltage: 3.3 to 5 VDC - outputs: 1x analog + 1x digital - mounting: 1 mounting hole (3 mm) - 2 LEDs: 1x power supply LED + 1x comparator output LED - frequency range: 50 Hz ... 20 KHz - Impedance: 2.2 KOhm - Sensitivity: 48 - 66 dB - Operating temperature: -40 ... +85 °C - Dimensions (L x W x H): 44 x 15 x 10 mm https://elecena.pl/product/20786937/wpse309-arduino-microphone-sound-sensor 2022-05-05 https://elecena.pl/product/20786937/wpse309-arduino-microphone-sound-sensor 2022-10-31 https://elecena.pl/product/20786937/wpse309-arduino-microphone-sound-sensor 2024-02-12 https://elecena.pl/product/20786937/wpse309-arduino-microphone-sound-sensor 2024-07-26 https://elecena.pl/product/20786937/wpse309-arduino-microphone-sound-sensor 2025-02-08