章 1621: Despicable!

It was not difficult for modern people to learn how to use this thing as long as they studied it for a while.

A moment later, Lin Yuelan knew where the switch was, where to adjust it, and how to detect it. She knew everything clearly.

As long as this thing was equipped with batteries, it could be used.

The metal detector wasn't very big. It was about the size of an ordinary guitar and could be carried on one's back. It wasn't very heavy either. Lin Yuelan weighed it with her hand and found that it weighed about ten pounds.

However, because of the special nature of this item, geological survey personnel like Yuan Shutong would have to bring more than one item. They might also have to bring tents, change of clothes, and so on for a long journey. The weight of all these things added up was definitely not light.