Features 1. Wide input range. This product uses AD620 for amplification, capable of amplifying microvolts and millivolts. 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 amplification of the input signal, with gain adjustable up to 1000 times 3. Zero point adjustment via potentiometer to improve accuracy, ensuring no 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, with four 3mm mounting holes evenly distributed around the edges, standard 2.54mm pin spacing on both sides Specifications 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 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