led tester voltmeter power detector electrical screwdriver indicator without box

SKU : 1961249

 757

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Description

Product details

  • Electrical Switch Detection: the electric pen contacts the contact rod, if the inner core of the wire is not damaged, the LED green light will light up; If it is off, the inner core of the wire is in poor contact.
  • Line Breaking Point Judgment: Detection along the line, LED green light line smooth, LED not bright line broken.

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