Waterproof DC 12V Voltage Meter, LED Digital Display Voltmeter Gauge Panel,round
Our battery gauge marks ranges: Red (≤11.8V), Orange (11.9-12.4V), Green (12.5-15.2V). Range is 5-36V, perfect for 12V vehicle batteries (cars, motorcycles, RVs) and 16V solar systems. Just connect two wires (red to ignition, black to battery) with the included bracket.