An optical / acoustical non-contact voltage detector that detects AC Voltage from 50V - 1000V. Features include an audible alarm, torch, and self-test function. This easy-to-use, non-contact voltage detector is ideal for showing if there is live electricity flow without touching anything. The unit has an on/off button, a pocket clip, and is ergonomically and robustly designed. The TIS934 is an optical & acoustic non-contact voltage detector that detects AC voltage from 50 to 1000 Volts. HSE recommends that voltages over 50V must not be touched, therefore with the capability to detect down to 50V, this is a very necessary product when used around electricity. This product is particularly useful at detecting circulating neutral currents due to 'PEN' faults. It detects 50V - 1000V without having to touch bare conductors and has a built-in audible & visual self-test. It indicates voltage using a bright red LED and a loud beeper. It is good for checking breaks in cables and can detect circulating neutral voltages caused by 'PEN' faults. Uses advanced digital filter technology for reliable results. CAT IV for indoor & outdoor use. IP65 compliant. Batteries included. 2 year warranty.