Giới thiệu Bảng Mạch Khuếch Đại Âm Thanh Micro Dc 5v-12v Lm386 200 Chuyên

LM386 amplifier chip, the magnification can be adjusted by the board above the adjustable resistance between 20 times to 200 times, you can directly drive low-power speakers for the use of electret microphone.
Operating voltage: DC 4V-12V
Board size: 20mm * 20mm
Package Included:
1 x LM386 Headphone Amplifier Board