1. This product has a digital interface and is a very simple pulse density modulation output 2. High sensitivity, can be integrated with electronic equipment, and is not easily interfered by the external environment 3. The signal to noise ratio is very low, only 61dB is very practical 4. The use of high-quality electronic components, precise technology, ensure durability 5. The pin has good contact performance to ensure stable work Project Type: Microphone Module Operating power supply voltage: 1.8 V to 3.3 V Interface type: PDM Colour:As Shown Material:PC Package Contents: 4 x MP34DT01 Microphone Module(Due to different product batches, the appearance may vary, which does not affect the use) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.