EPLZON 2 Pack DC 12V 24V Volt Meter Battery Voltage Gauge Digital Gauge Waterproof Voltmeter with Touch Switch and Mounting Plate Round for Boat Marine Motorcycle Truck(Red Light)

EPLZON DC 12V 24V Volt Meter Battery Voltage Gauge Digital Gauge Waterproof Voltmeter with Touch Switch and Mounting Plate Round kit Applicable for: The car voltmeter with LED light is suitable for motorcycle, car, boat, ATV, UTV, caravans, travel trailer, applicable in monitoring the voltage of the storage battery and measuring other product. Reverse Connection Protection: If the positive and negative poles are connected in reverse, the device will not burn out, but there will be no display Easy to Install： 1.Drill a hole with about 3mm 2.Put the panel on the hole and insert the voltmeter, Unscrew the nut on the charger. Place the charger in the hole and tighten the screw ring to the voltmeter 3.Connect red wire to plug(+)and black wire to the plug (-) 4.Connect "+" to the positive pole of the battery, "-" to the negative pole Why do we need a voltmeter？ With a precise 3-digit LED voltmeter, you could better monitor the starting battery voltage or charging rate when driving your car. So it can avoid the voltage if is too high or too low to affect the normal operation of your car, thereby helping to extend the service life of the car battery. Specifications: Measuring range: 5V to 32V DC Working voltage: 12V to 24V DC Measurement Accuracy: 0.1~0.2V Display: 3-Digit Led Digital Display Operating Temperature: -40°F ~ 176°F (-40°C ~ 80 °C) Package includes: 2 * Red digital voltmeter 2 * surface mount 2 * round nuts 4 * screws 4 * insulated terminals 2 * 23.6 inch connecting cables