Features: Zero live wire determination: Hand touch cap test socket,the green light is the zero line, and the traffic light is the fire line. Voltage sensing:The green light will turn on when a voltage is sensed. Line breaking point judgment:Check along the wires, where the green light disappears is the breakpoint. Bright beads: High brightness operation makes measurement easier and still clearly visible in sunlight Intelligent chip: the main board professional upgraded chip control program, higher security, longer service life Electrical switch detection: the electric pen contacts the contact rod, if the inner core of the wire is not damaged, the LED green light will light up;If it is off, the inner core of the wire is in poor contact Easy to carry: pen design is more convenient to carry when working, thoughtful design, careful everywhere Application, it can be used in electronics factory, electrical appliances, automobile maintenance, household and so on, with a wide range of uses Specifications: Product size: 168*26mm Battery model: 3 LR41 button batteries(included) Bit Specifications: Word/cross Batch length: 25mm/0.98 inch Batch head material: Chrome vanadium steel magnetic Shell material: ABS plastic Product name: Screwdriver Electric Tester Pen Package include: 1* Screwdriver Electrical Voltage Tester Pen