Portable electronic receiver designed and used to locate and trace live, buried electrical cables Inexpensive, easy to use instrument with true "feed-through" audio No transmitting unit necessary Wide application from small rural systems to complex primary and secondary networks in metropolitan areas Used by electrical and pipeline contractors, municipal electric, street lighting, power companies, gas companies, industrial maintenance personnel, and many more Accurate and dependable Operating weight less than 3 Lbs. Powered by 1 9V "transistor" battery!