The Labgear Voltage Detector pen for clear detection of 90-600v AC without metal contact with a convenient LED torch for easier inspection ideal for safe, non-contact detection of 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. Tip will glow and audible tone will sound if a voltage is present. The tester is a convenient pen size with a fixing clip and easily fits into pockets ready for use. 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. Key features audible and visual alarms with voltage presence 90V to 600V Voltage range non-contact voltage detection meets IP40 standard 2 x AAA batteries included