5PCS Electret Microphone Amplifier Module Adjustable Gain LM386 20-200x DC4V-12V Features: LM386 power amplifier chip allows gain adjustment between 20 and 200 times via onboard variable resistor; capable of directly driving small power speakers, suitable for use with electret microphones Electret microphone amplifier module supports GND grounding and VCC connection to 2.4-5VDC; for optimal performance, use a stable and low-noise power supply such as 3.3V The amplifier provides good power supply noise suppression with operating voltage range of DC 4V-12V Microphone amplifier module constructed from high-quality ABS material offering impact resistance, scratch resistance, and environmental friendliness Package includes 5 pieces of amplifier modules, providing ample quantity for replacement and extended use Specifications: Item Type: Electret Microphone Amplifier Module Model: LM386 Material: ABS Package Includes: 5PCS * Electret Microphone Amplifier Module