Square LED Digital Voltmeter Ammeter Hertz Meter Signal Lights Voltage Current Frequency Combo Meter Indicator Tester. Display: voltage, current, frequency. Measuring voltage range: 60-500V AC Measuring current range: 0 — 100A Measuring current range: 20-75Hz Specification: Material: Plastic Size Chart: Size: Approx. 20x28x51 mm / 0.78x1.10x2.00inch Package Includes: 1 Piece Square LED Digital Voltmeter Ammeter Hertz Meter Note: Please allow 1-3mm measuring deviation due to manual measurement. Due to the different monitor and light effect,the actual color of the item might be slightly different from the color showed on the pictures.