up to 1000VAC with visual/audible indication. 75 to 1000VAC input with 45 to 65Hz frequency range. LEDs phase orientation -LRB- clockwise or counter-clockwise -RRB- and whether each phase is living. sounds intermittently when true phase is detected and continuously if phase is reversed. long-lasting with hinder cover magnet for attachment to an AC distribution panel for uncomplicated measurement. adaptable Hi/Lo brightness switch for making measurements in dimly lit areas or sunlight. Fully insulated alligator with citywide jaws. inferior battery. realized with three constitutional 30 '' test with largish color-coded alligator clips, four AA batteries, and pouch case .