Features: High hardness and good electrical conductivity Electrical maintenance / screwdriver assistance Humanized clip-on design for easy electrical maintenance and portability Fully insulated anti-fall material, improved safety performance High-brightness LED bulb self-inspection: high-brightness works smoothly and is clearly visible in the sun Specifications: Model: electrician color light metering pen Lamp beads: high brightness LED lamp beads Shell material: anti-drop insulation PC Measuring range: 70-250V Bit Material: HRA Titanium Alloy Product length: 15.5m Word batch head: 4mm Exposed drill bit: 17mm Battery model:3 LR41 button batteries Packing list: test pen*1 Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.