Review on ZRM Digital Voltmeter Ammeter Display by Ricky Bedell

I first bought a 10 amp model with a current shunt built in, there are 4. None of them read the amps correctly and set them within reasonable limits. I decided to try this provider and the 50 amp version with the shunt removed. This worked very well. I was able to adapt it to my certified meter. Even with a 50 amp shunt this thing will read in milliamps when the LED is connected to a load. Lucky enough. The only reason I didn't give it 5 stars is because you need to get the correct wiring information from YouTube. There is no documentation with this. Luckily I have experience with current shunts so the wiring was pretty easy.