The digital “All-in-One" DUO voltmeter checks the voltage of fence devices, electric fences, and 9 or 12 volt batteries.
Conventional fence voltmeters only measure the fence (high) voltage and cannot read the lower battery voltages. Multimeters can test batteries but are damaged when testing the high voltages of electric fences.
The DUO voltmeter is a single, inexpensive tool which measures both high and low voltages.
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