ITEM NAME:Voltmeter Voltage Indicator Panel Meter G8N5 Voltmeter Voltage Indicator Panel Meter G8N5 Display: Three digits You can install these mini voltage display easily. Measuring range: DC 7 - 20V Working current: DC 7 - 120V 20 mA Display color: Blue Color: Blue Dimension: Approx. 48 x 29 x 23 mm Accuracy: 1% Storage temperature: -10Â °C + 65Â °C Red with positive combine, black with negative..48 x 29 x 23 mm. Working current: DC 7 - 120V 20 mA. Display color: Blue.