XL series Voltage tester is extremely rugged and reliable three-in-one tester. Vibrates when voltage is present. Tests for high voltage up to 600V AC/DC. Tests for voltage as low as 6V AC/DC. Automatic switching continuity tester. Replaceable leads with shielded probe tips. Bright, long-life LED and neon indicators. 5 - year warranty. CAT III 600V.