Pixnor Waterproof Round Panel DC 12V-24V Motorcycle LED Digital Display Voltmeter Voltage Meter Shell color: Black.LED light color: Red. Material: ABS.Dimensions: 83 * 70mm. Used to monitor the battery voltage timely. Bulit-in reverse connection protection circuit which safeguard your battery and the voltmeter too. The voltage which is too high or too low is faulty, it is recommended to repair shop for inspection.