Review on Watt Meter Power Analyzer - Greatlong 200A Power Analyzer with High Precision Digital LCD Screen for Voltage, Current, Power, Charge, and Energy Measurement by James White

The description on amazon.com specifically says: I was planning to use this to measure the current drawn by ws2812 LED filaments running from a 5V power supply .Just within tolerance, I thought. So I connect it to the circuit, the LEDs work fine, the measured voltage on both the source and load side is 5.13V, but the display stays completely blank. Then I find paper. the attached documentation shows [b]8[/b]-60V. It's completely useless to me, so let's go back.