1. Chip:LM358
2. 100 times gain circuit design;
3. Onboard 10k 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 ~ 12V ;
7. Board size: 32.7 (mm) x13.3 (mm);