Ensure your work environment is free of any live voltage, and test alternating electric fields or probable sources of error. Contactless Wiha voltage tester will give an initial indication of whether an area is live or not thanks to an optical signal. Once switched on, the permanently green LED indicates that the tester is ready for use. If a voltage is detected, the red LED lights up, which can also be easily seen in daylight. Two AAA batteries (included) are required to operate the device. > Pocket clip, the voltage tester snugly fits into any shirt or trouser pocket thanks to its handy size. > Voltage tester is suitable for all socket variants worldwide, measurement tip adapted to international usage. > Designed for CAT IV 1, 000 VAC, the single-pole voltage tester complies with EN 61010-1/IEC 61326. Product dimensions: 240 x 29 x 49 mm (LxWxD) | Wiha Tools Voltage Detector 90 - 1000 V AC Single Pole Non Contact