A voltage detector used to determine if an exposed or unexposed wire or terminal is "hot." The voltage detector includes a low density EMF field detecting circuit and a high density EMF field detecting circuit each coupled to an indicator to inform the user that the "hot" wire or terminal is nearby. In the preferred embodiment, the voltage detector includes an LED flashlight that uses a voltage multiplying circuit that enables it to use a single AA or AAA battery. The voltage multiplying circuit raises the battery voltage from 1.5 volts to approximately 5 volts required to sufficiently energize the main LED. In the preferred embodiment, the LED's reflector acts as the sensor probe for detecting the presence of electric field densities.