Features: Brand new and high quality Double display professional electricity measurement: Lamp display direct electric measurement, lcd display Inductions electricity measurement. Identification function: Directly measure electricity to identify Line detection: Inductive electricity measuring lcd display line judgments Detection: Hold down the steel hat with the hand and the tip of the electric pen, respectively, and the lcd display shows that the battery is sufficient, which mean that the battery is insufficient and dead. Rest assure that button lock the tool holder: The double head can easily replace and secure. Specifications: Material:ABS Length:Approx.180mm/7.08inch Package Includes: 1x Voltage Detectors Screwdriver note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.