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Product description:
1,onboard LM358 chips;
2,100 times gain circuit design;
3,onboard 10 k adjustable resistance, adjustable magnification ;
4,onboard power light;
5,chip has led the main pin, can directly input and output signals;
6,working voltage: 5 ~ 12 v ;
7,board size: 32.7 (mm) x13.3 (mm);
