Non-contact when testing. AC voltage test: 70-250V AC. DC voltage test: up to 250V DC. Polarity test: 1.2-36V DC. Touch the wire with the pen tip. If the indicator lights up, it means voltage exist. Ideal for testing AC cables, circuit breakers, wall sockets, junction boxes, fuses, etc. Safe to use, no need any power supply. Use 2 *AG13 batteries (not included)
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