SB 0.28 Inch 0-100V Three Wire DC Voltmeter

This voltmeter can be used to measure the storage batterys voltage in motorcycles and cars and also can grasp the storage batterys status. It also can be used to measure other voltage. 30V is the voltmeters maximum operating limited voltage, please leave enough margin when working, to avoid voltmeters permanent damage because of an electrical spark, power supply ripple, or other too high abrupt change of voltage. The red wire is to connect to the positive pole, the black wire is to connect to negative pole and the yellow/white wire is to connect to the positive pole of that source or another source across which we meant to measure the voltage. While measuring the supply voltage of another source make sure that negative pole is joined common. No need to worry even if there is any connection mismatch of the wires, the electric circuit wonot be a boom because it features reverse polarity protection. * Donot compromise best price and high quality * Package Includes 1pcs voltmeter * Operating Voltage: 0-100 VDC * This voltmeter will automatically move the decimal points position according to the different measuring voltage.