5PCS 0.28" Digital Volt Amp Voltmeter Ammeter Meter DC 100V 10A 3 Bits Red+Blue Display Voltage Current Tester

The media could not be loaded.  First off thanks to those wiring diagrams in the reviews. I didn't really need it for what I built, but it was fun to add this to my little project and it's working great. it's a spool winder, the while spool is special and the other is a cheap one.

I purchased 2 packages / 4 meters. There was no wiring diagram included. I asked the question and the reseller said to contact them. How hard is it to have a small printout of how to wire it included to begin with? I burnt up one meter trying to figure it out. I searched other vendors selling the same meter and finally found one that provided the meter wiring right in their advertisement / product photos. Maybe this sell with add such wiring diagram along with product photos. The videos linked to the vendor / product was also useless since the videos did not even show you how it was wired up. I have added the wiring diagram that I found and found to make the meters work correctly. Note you need a separate power supply to power the meter besides the power from the circuit that you are measuring voltage and amps from. I hope my image uploads and fully displays the wiring clearly. The item was as advertised. I received it as promised on time, when I asked the question the seller did respond to the question. It was well packaged. Once I found a wiring diagram on my own all was well. The meters seem to be decent and volt accuracy was very close when compared to a precision bench multi meter. I found the Amps to vary about 200 to 300 Milli amps when compared to the precision bench meter. but when you are looking at 10 or more amps, its not really that much of a concern, since the price for these meters is very inexpensive. Over all for the price, and performance I am pleased with these meters. There is a voltage and current adjust on the back of the meters. If you require very precise current and voltage readings I would say look at more expensive units. But over all nice little meters. And for my power supply unit I am building and using these for, small size is essential.

Some folks asked for a wiring diagram so that the dual voltage/current meter can monitor a single power source. To use this configuration, the single power source must be within the range of 4-30 vdc.

Don't know why people are having trouble with accuracy,of course it isn't going to be spot on throughout the whole range,I kind of look at it like setting swr on an radio,antenna setup,find that happy medium,or concentrate the highest accuracy for the voltages you use most,if your dead set on the entire range then just use 2,calibrate one for the lower end and one for the higher end,run them off seperate junctions or whatever,for the cost of these, it's no big deal. I am more than satisfied with these,and wouldn't hesitate a second to get more if needed.

The product works as is should.

The included shunt for this meter is gigantic- easily half again as long as the meter is. I wasn't expecting that even though the photos show it. I wanted to use the meter in a relatively compact space however I cannot because of the large shunt required for the ammeter... Be aware before purchasing!

Wasn't expecting much because the price is so reasonable for a set of 5 and reading reviews elsewhere about how inaccurate they are. To my surprise I wired up 3 units and the reading were not too far off. After quick calibration via the built-in dials all voltage and current readings are within 0.1v and 0.05 mA. Happy.

Only version that I was able to calibrate !