Euro Black 2 Battery Condition Indicator (E to F)Perimeter-lighted Black dial with bold White graphics, Black aluminum bezel, contoured White pointer and flat glass lens.A battery condition gauge monitors the state of charge of a 12 volt battery, indicating a dead battery and a charging battery and everything in between. It is connected to the positive terminal (positive stud) and negative terminal (ground stud) of the battery to be monitored. Specifications:Anti-scratch glass lens12 VDC negative groundPerimeter-lighted Black dialCan be adapted for 24 VDC systemsFactory P/N VP7901*Sold as an Individual**Gauge Cover not Included