Description
1. Onboard LM386 chip
2. 200 times gain circuit design
3. Onboard speaker terminal block
4. Onboard 10K adjustable resistance, can adjust the amplified volume
5. Onboard power indicator
6. The main pins of the chip have been drawn out, and audio signals can be directly input
7. Working voltage: 5?12V
8. Board size 41 (mm) x13 (mm)
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