Description: Voltage display input voltage range is AC 50-500V, measuring voltage range is AC 50-500V. World-class industrial PC materials. Safe & Durable. High quality fasteners for easy disassembly. Dust cover effectively control dust entry. Long-life & reliable LED Indicator. LED for energy saving and low maintenance cost. 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: Product Name: Digital AC voltmeter Model: AD22-22DS-V Color: Blue Opening diameter: 22mm Rated power: 0.5W Voltage range: 50V-500V AC Ambient temperature: -25 °C to +65 °C Relative humidity: ? 98% Mechanical life: 1000000 times Electrical life: 500000 times Package Includes: 1 Piece Digital LED Display Voltmeter