Clear, patented all-round LED display Complies with the current standard for voltage detectors DIN EN 61243-3: 2010 Fibre-optics for optimum voltage indication Robust housing with ergonomic handle and anti-slip ring Your reliable companion when it comes to testing electrical systems and equipment. The all-round LED display and unique fibre-optic technology mean the voltage indication can be seen clearly and distinctly from any position with this voltage tester.