Multifunctional LED insulation test pen, LED highlight lamp bead electric pen. Function: zero live wire discrimination, on-off detection, line breakpoint detection. Pen clip design, it is convenient for electricians to go out for maintenance, small and light and easy to carry. The high hardness chrome vanadium steel one-word batch head is convenient for electrician maintenance work. Transparent insulating material, drop-resistant, all-round insulating material, improve safety performance. Specification: Material: Plastic Battery Model: 2 Button Batteries Lr41 Measuring Range: Voltage 70~250v Net Weight: 21g Shell Material: Anti-drop Insulation Ps Bit Material: Chrome Vanadium Steel Bit Slotted Bit Diameter: 3mm/0.11 Inches Size Chart: Total Length: 138mm/5.43inch Package Includes: 1 Piece Voltage Tester Pen Note: Colors might be different due to different monitor display. Please allow slightly difference in size due to manual measurement.