The MILWAUKEE® GFCI Digital Outlet Tester is designed to reduce the risk of electrical shock by GFCI outlets. The overmolded grip helps to increase durability and user comfort for all applications. Additionally, the light illuminates to indicate GFCI test activation if working properly. The LCD screen gives clear readings of an outlet’s wiring conditions, voltage, and trip time. The LED visual indicators help to determine an outlet’s wiring conditions. Indicated wiring conditions: hot and ground reversed, hot and neutral reversed, hot open, neutral open, ground open, and correct wiring.