This 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 1000 VAC The tester is a convenient pen size with fixing clip easily fits into pockets ready for use 2x 1.5v AAA Alkaline batteries included Voltage Detection: 50V-1000VAC. Frequency: 50-500Hz. Measurement: CAT II, 1000V. Category: CAT III, 600V Warning: Always test on a known live circuit before use This detector is not designed to carry out contact tests on live supplies. Any other form of test should be carried out by a qualified electrician, Manufacturer: Faithfull