Specifications: Material: ABS Electrical components Color: Red/White/Blue/Green/Yellow Voltage Measuring Range: AC 60~500V Current Measuring Range: 0~100A Frequency Measuring Range: 20~75Hz Panel Size: 31*31mm / 1.22*1.22in Installation Diameter: 20.3mm / 0.8in Quantity: 1 Set Package included: 1 x AC Voltmeter Ammeter Frequency Meter 3 in 1 Indicator 1 x Current Coil Transformer Specifications: Material: Electrical components Color: Red/White/Blue/Green/Yellow 22mm Digital Display Voltage Measuring Range: AC 50~500V Current Measuring Range: 0~100A Rated Frequency: 50/60Hz Size: 28.3x51.4mm/1.11x2.02" Installation Diameter: 20.3/0.8mm Features: 100% brand new and high quality It is digital voltage tester signal indicator, high brightne LED display and cylindrical main body. The meter can only use to measure AC electricity. It can be used as signal indication, warning signal, accident signal and other signals in the line of electric power, telecommunication, machine tool, ship, textile,printing and mining machinery. Specification: Item: Indicator Voltmeter &Ammeter Voltage: AC 60-500V Current: 0-100A Material: Electrical components Panel size: 31x31mm/1.22x1.22inch Mounting aperture:22mm Display color: Red, Blue, Green, Yellow, White Quantity: 1 Set Note: 1.Please allow 0-2mm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!