Provides another level of safety for line crews, storm restoration workers and first responders. Alerts user to the proximity of electric fields or energized electrical equipment with a loud alarm and bright lights. Frequency of alarm increases as the user gets closer to the electrical hazard. Detects voltage above 4kVAC line-to-line. Typical initial warning distance is about 7 ft from a 4kVAC conductor. Warning distance increases with higher voltages. Adjustable clip for use on personal protection gear. Field replaceable AAA batteries with low battery indicator