Features 1. Wide input range. This product uses AD620 for amplification, capable of amplifying microvolt and millivolt level signals. Offers higher amplification accuracy and better linearity compared to LM358, with a maximum voltage output range of ±9V 2. Equipped with a potentiometer to adjust the gain of the input signal, amplification up to 1000 times, adjustable via potentiometer 3. Zero point adjustment available through an adjusting potentiometer to improve accuracy, designed to prevent zero point drift 4. Incorporates a 7660A negative voltage converter chip to generate negative voltage (-Vin), suitable for driving dual power supply loads 5. Compact design, size: 32 x 22mm, includes four 3mm mounting holes evenly distributed around the perimeter, 2.54mm standard pin spacing on both sides Specification Item Type: Voltage Amplifier Module Material: Resin Model: AD620 Input Voltage: DC 3-11V Gain: 1.5-1000 Times adjustable, zero point adjustable Common Mode Rejection Ratio: 100dB Input Bias Current: 1.0nA (maximum) Negative Voltage Output: Greater than -Vin. Due to internal resistance of the negative voltage chip, actual output is greater than -Vin; larger load power results in greater negative voltage drop Size: Approx. 32 x 22mm / 1.3 x 0.9in Mounting Holes: Approx. 3mm / 0.12in Standard Spacing: Approx. 2.54mm / 0.1in Package List 1 x Voltage Amplifier Module 2 x Pin Header