2-in-1 Magnetic Flathead Phillips Screwdriver Electricity Detector Tester Pen Two purposes, one for measuring electric pens and the other for screwdrivers. Two specifications: Straight and cross screwdriver, with a magnetic design on the head, which can adsorb screws and small metal parts, improving work efficiency Neon Light DisplayMagnetic Screwdriver Head, When the pen detects voltage, the neon light of the circuit pen lights up; the higher the voltage, the brighter the neon light High-Brightness Color Light Tester Screwdriver The neon tube display in the voltage tester screwdriver lights up when voltage is detected. The brightness of the neon light increases with higher voltage levels, providing clear visual feedback for safe operation. This electric pen contacts the contact rod, if the inner core of the wire is not damaged, the green light will light up; if it is off, the inner core of the wire is in poor contact Usage MethodWhen using the voltage testing probe, the screwdriver must be inserted at the bottom before testing, and your finger should be fixed at the end of the handle. When voltage is present, the neon tube will light up and operate safely Multi Electrical Tools Zero / live wire determination, line breaking point judgment, electrical switch detection, non-contact voltage sensing, voltage detector pen can accurately detect voltage, effectively preventing the risk of electric shock