Feature:1. Using high-quality materials with guaranteed quality2. Can drive headphones and low-power speakers3. Using LM386 amplifier chip4. The product is exquisite and compact5. The product is easy and convenient to operateProduct Introduction: Using LM386 amplifier chip, the amplification factor can be adjusted between 20x and 200x through the adjustable resistor on the board, which can directly drive low-power speakers and is suitable for use with electret microphonesProduct parameters:Working voltage: DC 4v-12vChip: LM386Specification: Module version/version with volume adjustmentThe package includes: