This multifunctional electric detector streamlines complex electrical tasks with its functionality / not testing modes, polarity identification, and battery saving operate ideal for prolonged job use 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 Designed for electricians, maintenance technicians, and enthusiasts requiring stable circuit analysis in residential wiring, industrial panels, or appliance repair scenarios for junction box inspections, outlet testing, and automotive electrical troubleshooting – especially in low light conditions where its flashlight activate display ensures clear electric readings The Digital electric Tester Pen delivers precise 12V 400V measurement with NCV not detection, built in LED illuminate, and live / neutral wire differentiation through color coded alerts for professional electrical diagnostics, Manufacturer: APGLSXY