The document describes an IEC electronic voltage detector that can be used both indoors and outdoors. It uses capacitive technology to detect voltages between 5 and 30 kV at frequencies of 50 or 60 Hz. For substation use, it has an electrode extension screwed onto the device to ensure no internal failures. It is powered by a 9V battery and detects voltage presence with a bright red flashing LED visible over 20 meters and an audible alarm over 67 dB. It comes in a protective carrying case.