Feature: 1. Wide input range, using AD620 to amplify, can amplify microvolts and millivolts, higher accuracy and linearity than the LM358 on the market. 2. A potentiometer is used to amplify the input signal, the magnification is up to 1000 times, and it can be adjusted only through a potentiometer. 3. Adjust the null point through the null point adjusting potentiometer to improve the accuracy, and there will be no null‑point drift phenomena to meet customer needs. 4. There is a negative pressure output module, and the 7660A negative pressure chip is used to output negative pressure (‑VIN), which can be provided to customers to drive other dual power loads. 5. Small size, 4 3MM positioning holes are evenly distributed around, 2.54MM standard spacing is arranged on both sides, and the maximum voltage output range is ±10V. Specification: Item Type: Millivolt Voltage Amplifier Input Voltage: 3-12VDC Magnification: 1.5-1000 Times Adjustable, the Null Point Can Be Adjusted the Same As the Lower One Signal Input Voltage: 100UV--300MV Signal Output Range: ± (VIN-2V) Negative Pressure Output: Greater Than -VIN. Due to the Output Internal Resistance of the Negative Pressure Chip, the Actual Output is Greater Than -VIN, the Greater the Load Power, the Greater the Negative Pressure Drop Offset Voltage: 50MV Input Bias Current: 1.0NA (Maximum) Common Mode Rejection Ratio: 100DB Offset Voltage Drift: 0.6MV / C (Maximum) Stable Time: 2MV / Month Maximum Simultaneous Interpretation Set Size: Approx. 32 x 22mm / 1.3 x 0.9in. Package List: 1 x Millivolt Voltage Amplifier Note: The use of the module requires a certain electronic basic. If there is no basic customer, please purchase with caution. Our store provides technical support.