Generator Dual Display Led, Voltage Hertz Meter For Generator Frequency Meter Digital AC Voltmeter Frequency Meter Test Tool (Black)

AC 80-500V LED dual display of AC voltage and frequency at the same time. The data is more intuitive, two-tone LED display, red+green, clear and easy to monitor at a glance. Easy to install, built-in buckle installation, more stable. No need power supply, two wires connect directly with AC 80-500V, then you can finish testing. The meter only fits 45-65Hz pure AC power supply, should not be used for square wave, inverter output.