Electrical Tester Pen Screwdriver 12-250V AC DC Outlet Circuit Voltage Detector Test Pen Features: It can use non-contact form to detect whether the object is electrified or not, and can detect automobile high-voltage tapping line. Blue Display Screen: Test in a dim environment can also see the value clearly. LED Lamp lighting, easy to find lines in dim environment, and can be used as emergency flashlight. Specifications: Material: Metal + Plastics Working Temperature: -10 - 50℃ Powered By: 3Pcs x AG10 Battery(Not Included.) Size: 143x36x18.7mm Detection range: DC Voltage: DC12/36/55 V AC Voltage: AC70~250V The package includes: 1pcs X electrical tester pen