Features: The Digital electric Tester Pen delivers precise 12V 400V measurement with NCV not contact detection, built in LED illuminate , and live/neutral wire differentiation through color coded alerts for professional electrical diagnostics. Engineered with steel tip and shockproof ABS housing, this compact tool combines auto shutdown energy efficiency, rapid electric sensing, and double visual/auditory response systems for enhanced safety. Designed for electricians, maintenance technicians, and enthusiasts requiring stable circuit analysis in residential wiring, industrial panels, or appliance repair scenarios. Optimized for junction box inspections, outlet testing, and automotive electrical troubleshooting – especially in low light conditions where its flashlight activate display ensures clear electric readings. This multifunctional electric detector streamlines complex electrical tasks with its functionality contact/not contact testing modes, polarity identification, and battery saving operate ideal for prolonged job use. Specifications: Size: 166mm component : Plastic+ steel Weight: 45g Power supply: 2XAAA7 battery (not included) Flashlight: LED lighting Measurement ranges: 12-400v Length: about 166mm/6.53inch Tip length: about 38mm/0.14inch Package Includes: 1xDigital electric Tester note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.