Measures AC/DC voltage and polarity, 12-600V. Dust and water resistant to IP65 for longer tool life. GFCI test capability eliminates the need for additional testers. Visual and audible continuity test. Single-probe detection of live conductors for enhanced flexibility. Built-in flashlight for convenient location of conductors or terminals in dark places. Accessories included: protective probe caps, carrying case, (2) 1.5V AAA batteries.