She how she's holding what appears to be an MP3 player? It's actually an ultrasonic device that detects the presence of underground utilities. It also records what it finds and maps it against GPS data. But wait---there's more! The device also lays down an aural signal that controls the machines that dig up the sidewalk to expose the utilities. As you might have guessed, the device is made by Notner Engineering Services, Ltd. The look on the woman's face tells me she is "right on target."
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