The expert.s choice for building diagnostics. Is the basic electrical tester for residential electricians and HVAC technicians, who need a durable, reliable tool for testing voltage and continuity. It 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, it is an excellent choice for most light residential, and HVAC applications. Combining the advantages of traditional solenoid testers with features designed for added user protection, ruggedness and reliability, Electrical Tester is suitable for use in most residential, industrial and commercial environments. The testers have a hazardous voltage warning light and are capable of detecting voltage even when the battery is dead. The testers GFCI trip capability, built-in flashlights, continuity beeper and extra heavy-duty test leads and probes (both replaceable).