Quick Overview Keep tabs on the health and output of your vehicles electrical system safely and accurately. With a patented air core meter movement, this gauge operates with category defining accuracy anywhere from 8-18 volts on negative ground electrical systems. Installation is simple and it can keep you from being stranded on the side of the road. Autometers Race Proven Air-Core Electric Instruments Provide Quick And Accurate Readings Attributes: GTIN: 00046074159695 Brand Name: AutoMeter Add-On: 2121;2204;2203;2234;48009;48006 Extended Information: Country of Origin: United States Emissions : Released Life Cycle Status: Available To Order Packing Information: Quantity of Each: 1 Package UOM: EA Dimension: 4.5 x 4.5 x 4.5 inches Weight: 0.5 lb PDF: PDF: 2650-1079