This product also has a temperature display, which can facilitate the driver to check the temperature in the car.<br> High-brightness red LED three-digit digital tube display, easy to watch.<br> Colour:As shown<br> Material:ABS<br> As vehicle products become more and more abundant, adding speakers, adding refrigerators, vehicle vacuuming, vehicle inflation, vehicle lighting, and electricity for field outings...<br> Motorcyclists modify horns, change headlights, add speakers, use electric gloves...<br> When people are using electricity, they always worry about whether the battery will lose and whether the car will not be able to start.<br> Now you don't have to worry about it all the time. With a voltmeter, you can digitally display the fluctuation of your car's voltage at any time. Let you have no worries and enjoy playing.<br> If the car is powered on and not started, it is the voltage of the battery. The normal value is 12.2-12.8. If it is lower than 11.6, it is necessary to turn off the electrical appliances on the car as soon as possible and start the engine to charge immediately. If the value is lower than 10V, it may fail to start.<br> After the car is started, it is the generator voltage. The normal value is 13.4-14.8. If it is lower than 13.4, the battery cannot be charged. Check the abnormal load of the generator belt and vehicle electrical appliances. If it is higher than 14.8, the generation will damage the battery and the vehicle. Turn on the appliance and check the generator voltage stabilizer.<br> Package Contents:<br> 4 x Voltmeter<br> Only the above package content, other products are not included.<br> Note: Light reflection 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.