2 Wire DC 7- 100V 0.56" Mini Digital Red LED Panel Display Voltmeter Voltmeter Voltage Meter Can be used for car/battery car/motorcycle battery voltage measurement, and d ‘other forms of voltage. Support 36V / 48V / 60V / 72V / 84 Electric cars. Can be used in all kinds of voltage measurements. With reverse polarity protection, Avoid reverse connection damage.