Description:AC60-500V Mini LED Digital Display Ampermeter Current Indicator Monitor Ammeter Tester Voltage Measuring InstrumentSmall, exquisite workmanship, simple and convenient use.Made of high quality material, over-load protection.LED Display: has a nice lit background to boot, 3 digits; neat and compact, easy to read.Widely used in 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:Material:Electronic componentLighting Source: LED; Volt.: 60V--500V; Nature of supply: AC ; Main technical parameters:Environmental Temperature: -25+55; Working under vibration frequency 2-80Hz,acceleration at 0.7g; Relative Air Humidity: 98%; Pollution rank is three grade and installation category is III; Protection Degree: Head IP65 Voltage of working frequency: 2.5kV (AC valid value), 1min; Leakage Index: CT1100;Frequency: AC 50-60HzSize Chart:Diameter: 28.3mm/1.11inchPackage Includes:1 Piece AC Voltmeter Ammeter IndicatorNote:Please allow 1-3cm (0.4-1.18") difference due to manual measurement and slight color variation for different display setting.Thank you for your understanding, nice day!