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DIY 0.36 3-Digit 2-Wire DC 4.5~30V Red Light LED Digital Voltmeter Voltage Display Module - Black
Easy wire connection£¬ just need to connect two wires; Built-in reverse polarity protection£¬ won't burn even connect reversely; In order to get best accuracy£¬ the module will move the decimal position automatically according to different voltage; Will correct to two decimal places when voltage is lower than 10V; Correct to one decimal place when voltage is higher than 10V. Note: Do not use 30V voltmeter for 24V battery£¬ for the left capacity is insufficient for the voltmeter when battery is fully charged. More over£¬ higher pulse will be produced during charging and working.