Fluke 2AC901000V VoltAlert AC Non-Contact Votage Tester, 90-1000V AC 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 this pocket-sized tester will glow red when within close proximity of an outlet, terminal strip, or power cord where voltage is present.