Indicator Voltmeter big digital tube AC20V-500V round panel digital voltage meter indicator light electrical instrument type: AD101-22VM place of origin : Zhejiang Province,China(Mainland) brand name : NIN mounting diameter: 22mm color: white green red yellow blue voltage measuring range : AC20-500V frequency compatibility range : 50-60HZ display resolution : 1V sample rate : about 1 time/s no input signal hint message : display 000 display type : digital display
