DROK Car Thermometer: Digital Voltage & Temperature Monitor Tester with LED Display - Multifunctional Voltmeter Thermometer for Automotive & Motorcycle Battery Review

Both worked fine. I didn't rate the accuracy because I don't have a way to test it, but it seems correct lol. Looks good, they are very bright, actually a dimmer would be nice.

Convenient. I have one in every car I own. The only complaint I have is that they should let you choose the highlight color. I have 1 blue and 1 green with red voltage numbers. Blue is a more comfortable color.

Works as advertised, bought to monitor the 'health' of the basic battery/charger system when my family drives different cars. a great help when my daughters/wife see a low number so I know if I need to sort things out

These gauges are great. I keep one in my boat to see my house battery voltage and one in my car to see my alternator voltage. They were great and the colors are good too. I have a green and a blue one and both are very legible. I highly recommend them.

I bought these mainly because it was an easy way to add a voltmeter, on two bikes and five other vehicles they work well enough for me, temperature readings are just a plus. A good voltmeter and engine temp gauge should be standard on all vehicles, although it is an air temp gauge it is good to know if your air conditioning is ok, few manufacturers take this into account.

If you are in the car business or not, but have useful information to give to someone who deals in their own cars, then this is a great tool for you! The tool lets you know at a glance what your charging/electrical system is doing as most voltmeters in later model cars are quite outdated. If not required daily? In the meantime, throw it in the glove box!

I like its visibility and functionality combining battery charging voltage and internal temperature. I bought this device to test the effectiveness of my car's environmental control system. Due to the location of the socket, I learned that the car's air conditioning never reaches the set temperature. But I can see how quickly the cabin can heat up. I am happy with this purchase.

The reason I bought this voltmeter is we are heading into winter weather and I want to monitor the battery voltage to make sure both the battery and alternator are within the set parameters lie. I don't want to get stuck when the temperature drops below zero. The meter is accurate when reading voltage, I have not tested its temperature reading. The reason I gave it 4 stars was because I felt the display was too bright, I would give it 5 if there was a way to adjust it to my needs.

I just plugged it into my car's cigarette lighter and it immediately shows the current battery voltage and temperature in the car. Product 5 stars. I have ordered 2 of these. Both show the inside temperature in red. One of them shows the battery voltage in green and the other in blue. I'm taking off a star because the seller doesn't allow color choices when buying from Amazon. To me, the blue display looks cooler, but the green display is definitely easier to read.