The testo 750-1 voltage tester has an extremely practical all-round LED display which can easily be seen in every work position and from any location. In addition, large fibre-optic illuminators show the presence of voltage clearly and distinctly. The deep-seated anti-slip ring, the ergonomic shape of the handle and the robust housing provide greater comfort when working. The testo 750-1 voltage tester enables voltage or de-energization on electrical circuits or systems to be determined reliably. The instrument meets the latest EN 61243-3:2010 voltage tester standard and has a safety specification according to CAT III. In addition, it is suitable for continuity testing and rotating magnetic field measurement.