1. Drop-resistant test pen, drop-resistant and all-round insulating material, durable to improve safety performance 2. Self-checking LED high-brightne bulbs, long-life LED bulbs, high-brightne work without worry, still clearly visible in the sun 3. Slotted screwdriver, high hardne and good electrical conductivity, electrical testing for maintenance work - Slotted screwdriver is helpful for multi-purpose screws 4. Humanized pen clip, the design of the pen clip is convenient for electricians to carry out maintenance, small, light and easy to carry 5. To identify the zero live wire of the socket, place the hand on the touch pole, and the detection result LED red light is highlighted as the live wire LED light is off or slightly bright as the zero line Product Specifications: Item model number: B09 Measuring point range: 70-250V Material: anti-drop insulation PS Bit material: chrome vanadium steel bit Diameter of one-word batch head: 3mm Battery : 2 button cells LR41 (Shipping included Battery) Packing list: B09 70-250V flat-blade screwdriver multi-function induction test pen *1