Review on 📊 Eiechip LED Digital Voltmeter Ammeter: Mini DC Digital Multimeter 100V 10A, Blue Red LED Amp Dual Digital Display Volt Meter Gauge for Car Current Monitoring and Testing 0.28 inch display by James Prizgint

I like this counter in many ways. It is attractive, easy to install and has a high build quality. I have an accuracy problem. My application is 2.5-20VDC at 3A. Both current and voltage are not accurate. I adjusted the trims on the back which improved things a bit but not enough. For example, if a calibrated, high-quality benchtop meter and high-precision power resistors are used to measure current at different voltages, both parameters will have an error of up to 10% or more. The only documentation is the pictures on the side of the item, which is adequate but not very good. I think this meter is good for rough qualitative measurements but not good enough for power supply or other precise applications.