Features Smart Design: 58D sensitivity input together with L and G dual channel output promises stable working for more sound enjoyment. Wide Utility: Allows for extensive use as audio input end on speaker, computer, headphone, hearing aid and so on, very useful. Better Sound: Premium op amp core enables adjustable amplification gain and low ground noise floor for a clear and bright sound. Sound Sensor: Used for the mic sound detection, this pickup module can achieve condenser microphone audio signal amplification. Easy to Install: Light in weight and compact in size, the sound detection board is very convenient to install. Specification: Item Type: Microphone Pickup Module Material: PCB Power Supply: DC 2.6-12.5V Input: The board is equipped with a capacitive microphone (58D sensitivity). Output: The board has audio output ports L and G (G is the audio ground). Application: For Microphone Sound Detection Package List:1 x Microphone Pickup Module3 x Accessory Note:The board should use battery power as much as possible (two or more dry batteries or lithium batteries such as 18650), or use a linear power supply. If a switching power supply is used, please add a filter circuit to ensure that the circuit power supply ripple is small. The larger the ripple, the larger the noise. Package List 1 x Microphone Pickup Module 3 x Accessory