AC 40400V 100A Digital Volt Amp Panel Meter for Voltage Current Measurement
Display format: <10A display, for example: 1.00A; if <100A, such as: 10.0A; if display ≥100A, for example: 100A. Step 1: Press and hold the button (about 3 seconds) until the numbers on the screen start flashing, then release the button.