Features: The LM386 High Sensitivity Sound sensors Module features built in LM386 sound amplifier with adjustable gains up to 200x, enabling precise detection of faint sound signals for voice control and environmental monitoring applications. Equipped with visual LED indicators and standard 3pin interfaces, this module offer plugs and play connectivity and adjustable sensitivity for seamless integration into diverse electronic projects. for electronics hobbyists, robotics engineers, and smart home developers requiring professional sound detection capabilities in electronics projects and automation systems. Optimized for voice activated switches installations, security alarm systems, and interactive art projects that demand real time sound input recognition in various environmental conditions. This PCB based sensors module combines industrial sound amplification with user friendly operations, making it for prototyping sound responsive devices home automation, educational robotics, and IoTs applications. Specifications: Materials: PCB Product size: 34x18mm Product weight: 8g Working voltages: DC3.3V~5.3V Microphone sensitivity: 52dB Frequency band: 50Hz ~ 20KHz Fixing hole size: 2.0mm Package Includes: 1PC LM386 Sound Detection Module 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.