Item Type: Microphone Module_x000D_ Material: PCB_x000D_ Purpose: Suitable for college students, engineers, technicians, factories, individual DIY, electronic enthusiasts and other operation learning_x000D_ Power Supply Voltage: 1.53.3V DC_x000D_ Output Power: 40mW_x000D_ Signal To Noise Ratio: 62dBA_x000D_ Size: Approx. 1.3 x 1cm / 0.5 x 0.4in 1The amplifier module on the breakthrough has a gain of 67, which exceeds the microphone bandwidth requirement. 2When no sound is received, the AUD output of the microphone module will float at one?half of the volt current condenser position. 3When the microphone keeps a certain distance from the arm and speaks into the microphone at a normal dialogue volume, the module in the amplifier will produce a peak output of about 200mV. 4The input of the bottom port can be flush with the shell you make, which can reduce additional welding. 5This AUD output can be easily connected to the ADC of the microcomputer.1 xModule 1 x Pin