DROK&reg; LCD Digital Voltmeter AC 80-500V Home Factory 110V 220V Panel Volt Meter High Voltage Monitor 40x40mm Range: AC80-500V ( Measure Alternating Voltage Directly ) Power Consumption: &lt; 0.2VA Resolution: 0.5% 2 digit Cutting Size: 36x21 mm Dimensions: 40x40 mm