1. Used in various mechanical equipment, lathes, machine tools, test benches, electrical distribution cabinets, resistance boxes, electrical control boxes, etc. 2. Built-in screw tightening, safer and more convenient. 3. The lamp uses a pure colorful super bright LED chip with pure color and a lifespan of up to 100,000 hours. 4. A variety of head styles, 5 optional colors, red, green, yellow, white and blue, clearly indicating different working conditions. 5. Parts are made of imported materials, durable and wear-resistant. - - - - - - - - - - - - Item Type: LED Digital Display Voltmeter Optional Color: White, Blue, Green, Red, Yellow Voltage Range: AC 60-500V Model: AD16-22DS or V Installation Size: Approx. ￠22mm or 0.9in Dimensions: Approx. 50 x 28mm or 2 x 1.1in (Height x Outer Diameter) - - - - - - - - - - - - 1 x AD16-22DS LED Digital Display Voltmeter