Inductive Amplifier with 2" SpeakerTraces concealed wiring, locates junction boxes, and finds breakers for live or dead circuits-no need for power interruption.Features:2" SpeakerOne Button OperationVolume ControlLED Display9V Battery Required (Not Included)For more than 140 years, Greenlee has been a provider of quality tools to the woodworking industry and, for over 70 years, to the electrical industry as well. Over 20 years ago, Greenlee made a commitment to the high technology necessary to keep pace with the changing needs of their customers. Proof of that commitment is in the modern facilities, state-of-the-art production equipment, and enhanced quality assurance programs which comprise the Greenlee way of doing business today.