The LT-Sonic is equipped with two main parts. A pulse generator as a Transmitter which is fitting to a fire hydrant, water meter base, or tap, and the hand-held receiver as a geophone to trace buried pipe away from the pulse generator.
The pulse generator is activated with external 6 to 12VDC. The pulse generator applies an adjustable wave signal along the pipe that is locatable by the sensitive piezo-electric sensor in the receiver.
The Generated acoustic signal is heard in the headphones. Also, if you use LT-Sonic APP, then the location is shown on the map which is adjustable.