LM YN Digital AC Voltmeter AC80-300V Frequency Counter 45.0-65.0HZ LCD Display Voltage Frequency 2 in 1 Meter Tester
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<b>[Product Information]</b><br>
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<li>2 in 1 meter which can measure AC voltage and frequency simultaneously, with potentiometer for frequency calibration, turn the screw clockwise to increase frequency and turn the screw anticlockwise to reduce the frequency.</li>
<li>It can directly connect two wires to the tested voltage to measure voltage and frequency without power supply.</li>
<li>It is for testing AC 80V to 300V with high accuracy and high working efficiency of 2 times/s measuring speed.</li>
<li>Only suitable for pure AC45-65Hz mains supply, can't be used for measuring circuit of square wave, inverter output and sine wave.</li>
<li>Two wires direct connection, standard installation size, can work under extreme environmental condition.</li>
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