DROK 48v Battery Meter, 10-100v Marine RV Battery Capacity Volt Monitor 12v 24v, Lithium Battery Voltage Fahrenheit Temp Indicator Gauge
I bought this and it is stuck at calibration screen. I try long press power button, long press setup button, I try long press both buttons. Still stuck reading 20.0 50.3v
p.s. I hit extra long press (10 seconds) and it goes to main screen but then defaults back to calibration screen. Instructions say to get to 20v but I don’t have anything that’s 20v.