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✔ Power Supply Voltage:5~30V.Equipped with a accurate miniature voltage transformer. ✔ Good performance: Have the ability to accurately sample and properly compensate the ✔ Founction: The module can measure AC voltage within 250V, which can be adjusted according to the output analog quantity. ✔ Easy to use: Equipped with ZMPT101B series high-accuracy voltage transformer and high-accuracy operational amplifier circuit, it can easily realize 250V in AC power acquisition. ✔ output: Sine output signal, median waveform (DC component).