Voltage Tester
Estimated value as of 2026 · Home Depot, Harbor Freight, and Walmart listings for common non-contact voltage testers[1][3][5][7]
A voltage tester is a handheld tool used to detect the presence of electrical voltage in wires, outlets, and fixtures without direct contact, commonly as a pen-style non-contact device for everyday DIY use.
Fun fact Non-contact voltage testers like the popular Klein Tools model can detect AC voltage from 50 to 1000V simply by holding them near live wires, providing instant visual and audible alerts for safety.
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