Abstract: A warning system for emergency first responders approaching high voltage power lines, said warning system comprising: a sensor unit; a warning unit. The sensor unit includes a sensor unit comprising: an encasement, an antenna, a voltage meter; a power source; and a transponder. The sensor unit and the warning unit are separated from one another and adapted such that the sensor unit can be attached to the roof of an emergency vehicle or shoes of an emergency responder, and the warning unit can be attached to a dashboard of the emergency vehicle of the body of the emergency responder, and be able to project a warning image for the emergency responder to view.