[Dr. Boogie]

You use the detectors to find artifacts in the field. The starting one just beeps more frequently the closer you get to one, but the more advanced ones show you dots on a radar screen for where it is and how rare each one is. You can find some pretty good ones right off the bat, like in that big cave complex near the burnt-out village. Lot of anomalies, but also the potential to score some phat loot.