2AC is the latest addition to the VoltAlert ac non contact voltage tester family from Fluke and is designed to be pocket sized and easy to use. The 2AC tests for energized circuits and defective grounds, whether it is for an electrician on the factory floor or the do it yourselfer around the house. The tip of the pocket sized tester will glow red when within close proximity of an outlet, terminal strip, or power cord where voltage is present.