The MILWAUKEE GFCI Receptable Tester is designed to reduce the risk of electrical shock generated from outlets. The over molded grip provides durability and comfort for all applications. Additionally, the visual indicator light turns on indicating the activation of the GFCI test, if functionally correctly. LED visual indicators help determine the wiring conditions of an electrical outlet. Wiring conditions indicated: hot & ground reversed, hot & neutral reversed, open hot, open neutral, open ground, and correct wiring.