Tough Meter voltage tester automatically selects voltage or continuity. Automatically powers on when any measurement is attempted. Features a backlit LCD (liquid crystal display), built-in test lead holders on the back, integrated flashlight, and 9.8 foot drop protection. CAT IV 600 volt modern solid state design for safety. Tests GFCI (ground fault circuit interrupter) protected circuits and uses standard replaceable multimeter test leads. IP53 dust and water resistant.