Milwaukee Digital GFCI Receptacle Tester is an advanced tool designed to reduce the risk of electrical shock from outlets. Featuring an over-molded grip for enhanced durability and comfort, this tester ensures reliable use in various applications. It includes a visual indicator light that activates when the GFCI test is functioning correctly. The LCD screen provides clear readings of the wiring conditions of an outlet, voltage, and trip time. LED visual indicators help determine the wiring conditions of an electrical outlet, indicating hot & ground reversed, hot & neutral reversed, open hot, open neutral, open ground, and correct wiring. This compact and reliable tester is for ensuring safety and accuracy in electrical installations. AAA Batteries Included. Model Number: 2224-20