Electrical Tester Has All Of The Advantages Of A Traditional Solenoid Tester, With Added Functionality, But None Of The Typical Drawbacks. With Voltage Measurement, Continuity, Built-In Flashlight, Gfci Trip Capability, and The Legendary Ruggedness and Reliability Of Fluke, The Tester Is An Excellent Choice For Most Residential, Commercial, and Industrial Applications. The 1AC-Ii Is The Pocket-Sized Voltage Detector That Can Quickly Test For Energized Circuits – A Must Have For Any Electrician.