5pcs 0.28 Inch Led Voltmeter Ammeter, Display Voltage Current Tester

Voltage Measuring range: DC 0 - 100VCurrent Measuring range: DC 0 - 10ADisplay: 0.28 inch digital tube, Two color red and blueWorking voltage: DC 4-30V(The maximum input voltage can not exceed 30V. Otherwise the meter will be burned)Applications:Suitable for automotive/electric cars/motorcycles battery monitoring or other products voltage current measurementNotice:The voltage between the thin red and thin black lines must be within DC 4.5-30VThe ammeter can only be connected to the negative of the device under test10A below ammeter (include 10A), built-in shunt, does not require external shuntWhen the black thin line vacant, it is better to use insulating tape around the exposed part of the wire, to prevent short circuitsIf just be used as a voltmeter, it is recommended that the yellow line and the black line were connected together, to prevent the ammeter digital flashingMaterial:Metal + plasticcolour:blackPackage Contents:5 * dc voltage testerOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.