Chapter 525:

Chapter 525:

"Micro bug", "micro camera" and so on, were really new terms that the girls had never heard of.

Madeleine couldn't help asking, "what are they used for?"

With a smile, Robb picked up a micro bug the size of a grain of rice and said, "before introducing its principle, let's try its function first."

After saying that, Robb stuck the bug under the stone table.

Then he took a corresponding box, walked to the transmission portal and threw it over. The palace guards on the other side of the transmission portal picked up the box and handed it to the queen and Madeleine.

Robb said, "now turn off the crystal ball and listen carefully to the box."

The queen turned off the crystal ball.

Then, the two women stared at the box. Suddenly, the two heard the voice of Robb from the box, "Marian, you didn't do the right thing!"

"Oh, no?" Marian's voice followed, "then what should we do..."

Robb's voice came from behind

Then Lilian's voice sounded again, "master, I failed to cook the shredded pork with fish fragrance you said last time. I think we'd better add a spoon of fish soup to the pot, so that we can surely make the fish fragrance."

However, the queen immediately shook her head and sighed, "unfortunately, the production method is too limited. Only he can help others draw runes on such a small crystal ball. Others don't know the shrink technique at all and can't draw runes on it, so they can't make it."

At this time, Robb turned his attention to his avatar and said with a smile, "it doesn't matter. You can order from me. For the sake of our acquaintanceship. I won't charge you any more. I'll sell you a set for twenty gold coins."

"An important strategic-grade item can't always be ordered," the queen said.

"Don't think so," Robb said, "I've told you last time that one day, intelligent people will come up with a way to draw on rice grains, and then you can customize it by yourself. What you need to do now is not to make trouble here, but to buy some bugs here for use. At the same time, you need to train those intelligent craftsmen and ask them how far they can develop the micro carving techniques."

The queen said, "don't flatter me. Even if I have to die and jump off the city wall, I don't need to buy it."

Robb turned his attention to his real body and said to his avatar, "Godfather, I originally wanted to give it to miss Madeleine, but I have to use your shrink technique to make it, so... You can have the shrink spell money. I won't accept the money of my invention, okay?"

Robb's consciousness returned to his avatar and nodded, "well, for your sake, half off, ten gold coins a set!"

"Deal!" the queen pounded on the table, fearing that Robb would go back on his word. It was indeed a very useful invention. She couldn't wait to give it to a spy and install it in the Royal Palace of Mondra. Then she would hear what that evildoer who usurped the kingdom and seized power had discussed with his ministers all day long about.

"And this micro-camera." Robb took out the second thing, the beads, which was smaller than a cherry, said, "it has the same principle with the bug. Both of them are one-way activated, but the picture captured by the crystal ball is very blurry. After repeated testing, I found a crystal ball of this size. The picture transmitted by it is barely visible. Although it is much less clear than a live camera, it is enough for monitoring."

"Take it to the enemy's house secretly and install it in some inconspicuous places, so that you can peep at the enemy's privacy. It can also be used to install it in some important military base, monitoring and defense, in case the enemy sneaks in when there are no guards..."

The queen knew it was a good thing. "If it's half off, I'll buy it too!"