This Faithfull Voltage Detector is a handy instrument that uses a safe, non-contact method to detect AC voltage in outlets, lighting fixtures, circuit breakers, wires and cables and can be used to find circuit breaks in a wire. A voltage test is easy to carry out by simply holding the detector by its body and placing the white end cap near or onto a cable or fitting believed to be carrying electricity. The detector tip will light up RED if a voltage is present. The tester can be used to detect voltage from 50 to 1,000 VAC. The tester is a convenient pen size with a fixing clip and easily fits into pockets ready for use. Specifications LED detects the presence of AC current. Locate breaks in power cables and wires. Non contact testing for complete safety. Convenient pen size with a pocket clip. 2 x 1.5v AAA Alkaline Batteries included. Voltage Detection: 50V-1,000V AC Frequency: 50-500Hz Measurement: CAT II, 1000V Category: CAT III, 600V Warning: Always test on a known live circuit b