Contact AC/DC voltage test: 12V to 500V. Non-contact AC voltage: LCD screen display the voltage, find phase line, ground line, firewire and breakpoint of phase line. Inductance breakpoint test: keep the tip of tester 1-5 cm from the tested electric line, if an induction marking is found on the LCD screen, the tested line is firewire. Ideal for testing household electric appliances, AC/DC cable, circuit breakers, wall sockets, junction boxes, fuses, etc. Safe to use, no need any power supply.
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