AC Voltmeter with Rectifier Accuracy:Class 1.5. Specification:3V, 5V ... SF-72-3.For high frequency or linear full scale AC measurements, these instruments measure average values of sinusoidal waveforms ... 20V, 30V, 50V,100V, 150V, 200V, 250V, 300V, 400V.450V, Rated voltage over 450V use external resistor(rated current 5mA).5 ... or have further enquiry, welcome to contact us. AC Voltmeter with Rectifier