Feature: 1. The amplifier module on the breakthrough has a gain of 67, which exceeds the microphone bandwidth requirement. 2. When no sound is received, the AUD output of the microphone module will float at one‑half of the volt current condenser position. 3. When the microphone keeps a certain distance from the arm and ss into the microphone at a normal dialogue volume, the module in the amplifier will produce a output of about 200mV. 4. The input of the bottom port can be flush with the shell you make, which can reduce additional welding. 5. This AUD output can be easily connected to the ADC of the microcomputer. Specification: Item Type: Microphone Module Material: PCB Purpose: Suitable for college students, engineers, technicians, factories, individual DIY, electronic enthusiasts and other operation learning Power Supply Voltage: 1.5～3.3V DC Output Power: 40mW Signal To Noise Ratio: 62dBA Size: Approx. 1.3 x 1cm / 0.5 x 0.4in Package List: 1 x Module 1 x Pin