uxcell Digital Voltage Tester Electric Pen Screwdriver LCD Circuit 3mm Slot

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【INDUCTANCE BREAK-POINT TEST】When the hand pushes the "Inductance Break-point Test"button, the slot head approaches the wire, and a "⚡" symbol appears. The slot head moves along the wire all the time. When the "⚡" symbol disappears, this is the breakpoint
【SELF-CHECK TEST】Self-check test before using, holding the slot head in one hand, pressing the direct test button in the other hand, lighting indicates that the circuit pen battery is sufficient
【FIRE LINE TEST】The finger touches the direct detection button, and the voltage pen inserts the copper core into the fire wire. The value on the screen is 12V/36V/55V/110V/220V
【NULL LINE TEST】The finger touches the direct detection button, and the voltage pen inserts the copper core into the fire wire. The value on the screen is "⚡"
【PAY ATTENTION TO】Contect test: Probe the live metal contact(wire or terminal)with screwdriver end.Press the "DIRECT" key to test Voltage.Then the voltage level will be indicated on the digital display on a rising scale : 12V,36V,55V,110V,220V