Features: Accurately measure environmental noise levels with high 50dB sensitivity using this microphone decibel sensoring, featuring both analog output and 3/4pin interfaces compatibility for projects. The DC4.5V-5.5V powered module delivers precise sound measurement through analog signals output while maintaining space saving PCB design for embedded systems. for electronics engineers, IoTs developers, and enthusiasts creating smart devices, sound analysis tool, or environmental requiring realtime noise detection. Monitor ambients sound in industrial settings, integrate voice activated controls in smart homes, or develop noise triggered alert systems for security applications. for seamless integration with platforms, this plugs and play sound measurement module simplifies prototyping while offering professional accuracy in sound signals processing projects. Specifications: Materials: PCB Product Size: 33x14x10mm Product Weight: Single 4g Working voltages: DC4.5~5.5V Output methods: Analog Output Frequency ranges: 100~10000Hz Sensitivity: 50dB Output interfaces: 3Pin/4Pin socket interfaces Quantity: 2Pcs,4Pcs(optional) note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item. Package Includes: 2/4Pcs Microphone Noise Decibel Sound sensoring Accurately measure environmental noise levels with high 50dB sensitivity using this microphone decibel sensoring, featuring both analog output and 3/4pin interfaces compatibility for projects. The DC4.5V-5.5V powered module delivers precise sound measurement through analog signals output while maintaining space saving PCB design for embedded systems. for electronics engineers, IoTs developers, and enthusiasts creating smart devices, sound analysis tool, or environmental requiring realtime noise detection. Monitor ambients sound in industrial settings, integrate voice activated controls in smart homes, or develop noise triggered alert systems for security applications. for seamless integration with platforms, this plugs and play sound measurement module simplifies prototyping while offering professional accuracy in sound signals processing projects.