Review on 🔧 Neoteck Auto Ranging Digital Multimeter - Portable Case, 4000 Counts Volt Meter for AC/DC Volt Current Resistance Capacitance, Frequency, Temperature, CMOS TTL Duty Cycle, Transistor Diode by Virgilio Feliciano

Not sure if this is common with this meter but all batteries have already been installed. This caused some oxidation that had to be removed before the gauge would work. After a brief flush, the gauge was functional and within the expected error range of the other gauge. I'm a little concerned that the oxidation may come back, time will tell. All in all a decent meter for the price, just a shame the batteries weren't pre-installed.