Description100% Brand New And High QualityWorking voltage:4-30V DCWorking current:<10mADisplay: 0.28" Two color blue and redMeasuring range:DC 0-100V 0-100A (more than 10A need shunt )Refresh rate: about 200mS / timesMeasure accuracy: 1% (?�� 1 digit)Operating temperature: -10 to 65?? cWorking pressure: 80 to 106 kPasize :48?��29?��26 mmThe module has reverse polarity protection， even if it will not damage the module reversed.50A and 100A ammeter scale accurate to 0.1A， 10A ammeter less accurate to 0.01A， voltmeter accurate to 0.1V.Package includes:1 x 100V 100A DC Digital Voltmeter Ammeter1 x Current ShuntWe can also wholesale if you need a large quantity of item please contact us