Features: This is a digital voltage tester signal indicator. High brightness LED display for easy reading. The indicator can only be used to measure AC electricity. Small size, simple structure, easy to install and use. It can be used as signal indication, warning signal, accident signal and other signals in the electrical lines of machine tool, ship, textile, printing and mining machinery. Specification: Measuring Range: 60-500V Input Voltage: 60-500V Voltage Measuring Accuracy: +/- 2% Ambient Temperature: 0-50 Dimension: Approx. 50x28x20mm / 2x1.1x0.8in Weight: Approx. 23g Optional Color: White, Blue Package List: 1 x AC Voltage Signal Indicator Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Package List 1This is a digital voltage tester signal indicator. 2High brightness LED display for easy reading. 3The indicator can only be used to measure AC electricity. 4Small size, simple structure, easy to install and use. 5It can be used as signal indication, warning signal, accident signal and other signals in the electrical lines of machine tool, ship, textile, printing and mining machinery.