Sperry Instruments DM4A Digital Multimeter open ground

open ground

Set Range Size: 4 - 13 mm

a button cell retainer holds the battery in place for a more accurate test

For ceilings 9 feet and higher

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Sperry Instruments DM4A Digital Multimeter open groundThe Sperry Pocket Pro Digital Multimeter offers 4 testing functions including AC DC voltage up to 450V, Resistance, Continuity, and Diode testing over 17 ranges with auto ranging capability. Designed for someone seeking a convenient, simple, yet accurate and efficient multimeter. This compact unit features overload protection on all ranges and both a low battery indicator and an Auto power off function to improve battery efficiency. Operates from (2)