If you want simple practicality and safety combined with an easy to read LED readout when testing for AC and DC voltages then the durable, IP54 rated TIS 819 Voltage Tester is the perfect solution. With a voltage rating of 12 to 690 V and a display showing both AC and DC voltages demonstrated using a successive LED display plus automatic polarity indication the battery-free TIS 819 is the perfect toolbox accompaniment.