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2Pcs 24-250V Electrician Circuit Tester Pen,Responsive Electrical Tester Pen,with LED Indicator Light Waterproof

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Fast Identification of Null-live Wire: The high intelligent chip delivers fast and sensitive identification of null and live wires. When the detection

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🔥 Find Line Breakpoints: One hand touches the bottom of the pen, and the tip of the pen touches the wire. The breakpoint is where the light goes out.

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