Chesapeake Black 2" Ammeter Gauge (-60 to +60 AMPS)Perimeter-lighted Black dial with stylish Blue and White graphics, polished stainless steel bezel, contoured White pointer and domed glass lens.An ammeter indicates the current flow through the battery charging system. A "zero center" ammeter, during chargine, shows a (+) positive reading indicating the current is flowing to the battery (charge). A (-) negative reading indicates current flowing away from the battery (discharge).2" - Hole Size: 2.0625" (53mm)Specifications: Anti-scratch glass lens Perimeter lighted back light 12 VDC negative ground Can be adapted for 24 VDC systems Factory P/N AP9530*Sold as an Individual**Gauge Cover not IncludedThis product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns. Specifications: Voltage - Input Range (Volts): 12/24 V Series: Chesapeake Black SS Gauge Size: 2" Box Set: No Gauge Type: Voltmeter/Ammeter Box Dimensions: 3"H x 4"W x 4"L WT: 0.2 lbs UPC: 759266137363