Features: *1. The is easy to use and carry. *2. Long life neon light bulb, high brightness work, worry-free,, stable brightness *3. Anti-slip handle with humanized design and comfortable hand feel *4-blade bits, 2.5mm chromium vanadium steel *5. Ergonomic design, practical and convenient, no need to install batteries *6. PVC material anti-fall insulation PVC *7. Identify the live wire: the live wire indicator light is on and the neutral wire indicator light is on. Specifications Specification: Product name: Slotted screwdriver measuring pen Product model: B07 Color: random color Measuring range: 100-500V Drill bit material: chrome steel Shell material: Insulated PVC Product technology: Neon light drill bit Diameter: 2.5mm Overall length: 140.7mm Exposed length: 19.9mm Application scope: It can be used in electronics factories, electrical appliances, car maintenance, homes, etc., and has a wide range of uses. packing list: 1*Test pen