🔴 5-Pack Red Mini Digital Voltmeter DC 3V-30V 0.56 Inch Two-Wire LED Panel Digital Voltage Meter by DaFuRui Review

Good value for money. As long as they work well. The amp is slightly different but adjustment is possible with the built in trimmer.

Small body, no external parts, self contained, gives both volts and amps at a good price. I don't know why they provided 5 leads but it works and gets 5 stars.

Used to show the DC voltage on the batteries powering my car amp. I would return them after three of them failed in a week. But I only started using them more than a month after delivery.

The photos show that you can do this before self-powering and measure up to 80V. The blocks that were sent to me do not have this. It still seems to work between 0 and 30 volts, but that doesn't give me the ability to measure up to 80 volts. In other words what was sent to me was not shown in the picture.

It's ok for what it is. Pretty accurate, not perfect, but close. My main problem is the accuracy of my order. Bought with blue numbers. When it arrived the package was blue. However, they were red. I really wanted blue for a specific project. I send back and find what I need from another supplier.

This is good value for money. What I like best is that they don't require a specific voltage to work. In other words, they run on 3 or more volts that you give them to measure. This way you don't have to connect a special 12 volt power supply when you need to measure 3 or 4 volts. The negative lead of one device came loose at the soldering point and had to be re-soldered, but what do you expect from a cheap Chinese product? Honestly, that's not unreasonable for the price.

Nice little meter; I really like it! BUT. Remember that the negative side of the ammeter is internally connected to the negative side of the power supply and voltmeter. This means its USE is limited to projects where it is acceptable to control the current on the negative side of the load. I consider this undesirable, it would be better to monitor the supply current, but I was able to change my wiring. However, many applications do not allow this. If the ammeter was insulated I would give it 5…