Measuring voltage range: AC 60v-500v. Opening diameter: 25mm. Color of lamps: As per availability. Power supply: AC. AD22-22FSV indicator light (pilot light) Voltmeter Accurate voltage measurement: Our digital panel volt meter provides precise readings, ensuring that you get the correct voltage measurement every time. Easy to read display: The large, clear display makes it easy to read the voltage measurement, even in low light conditions. Versatile use: Our digital panel volt meter can be used in a variety of applications, including automotive, marine, and industrial settings. Durable construction: Our digital panel volt meter is built to last, with a rugged design that can withstand harsh environments and rough handling.